From 31f1e4b31293764815b1a20d603b46fad86a2d64 Mon Sep 17 00:00:00 2001
From: Your Name <119736744+aborayan2022@users.noreply.github.com>
Date: Mon, 2 Mar 2026 02:44:49 +0200
Subject: [PATCH] feat: add PDF manipulation tools including Protect, Rotate,
 Split, Unlock, and Watermark functionalities

- Implemented ProtectPdf component for adding password protection to PDFs.
- Implemented RotatePdf component for rotating PDF pages by specified angles.
- Implemented SplitPdf component for splitting PDFs into individual pages or specified ranges.
- Implemented UnlockPdf component for removing password protection from PDFs.
- Implemented WatermarkPdf component for adding custom text watermarks to PDFs.
- Updated i18n files to include translations for new tools.
- Enhanced HomePage to include links to new PDF tools.
- Updated Nginx configuration to improve security with CSP and Permissions-Policy headers.
- Updated sitemap generation script to include new tools.
---
 backend/app/__init__.py                       |   2 +
 backend/app/extensions.py                     |   1 +
 backend/app/routes/pdf_tools.py               | 427 ++++++++++++
 backend/app/services/pdf_tools_service.py     | 652 ++++++++++++++++++
 backend/app/tasks/pdf_tools_tasks.py          | 438 ++++++++++++
 backend/config/__init__.py                    |   4 +
 backend/requirements.txt                      |   7 +-
 frontend/index.html                           |  12 +-
 frontend/src/App.tsx                          |  18 +
 .../src/components/tools/AddPageNumbers.tsx   | 171 +++++
 frontend/src/components/tools/ImagesToPdf.tsx | 208 ++++++
 frontend/src/components/tools/MergePdf.tsx    | 210 ++++++
 frontend/src/components/tools/PdfToImages.tsx | 183 +++++
 frontend/src/components/tools/ProtectPdf.tsx  | 168 +++++
 frontend/src/components/tools/RotatePdf.tsx   | 155 +++++
 frontend/src/components/tools/SplitPdf.tsx    | 174 +++++
 frontend/src/components/tools/UnlockPdf.tsx   | 144 ++++
 .../src/components/tools/WatermarkPdf.tsx     | 162 +++++
 frontend/src/i18n/ar.json                     |  86 +++
 frontend/src/i18n/en.json                     |  86 +++
 frontend/src/pages/HomePage.tsx               |  18 +
 nginx/nginx.conf                              |   2 +
 nginx/nginx.prod.conf                         |   2 +
 scripts/generate_sitemap.py                   |   9 +
 24 files changed, 3337 insertions(+), 2 deletions(-)
 create mode 100644 backend/app/routes/pdf_tools.py
 create mode 100644 backend/app/services/pdf_tools_service.py
 create mode 100644 backend/app/tasks/pdf_tools_tasks.py
 create mode 100644 frontend/src/components/tools/AddPageNumbers.tsx
 create mode 100644 frontend/src/components/tools/ImagesToPdf.tsx
 create mode 100644 frontend/src/components/tools/MergePdf.tsx
 create mode 100644 frontend/src/components/tools/PdfToImages.tsx
 create mode 100644 frontend/src/components/tools/ProtectPdf.tsx
 create mode 100644 frontend/src/components/tools/RotatePdf.tsx
 create mode 100644 frontend/src/components/tools/SplitPdf.tsx
 create mode 100644 frontend/src/components/tools/UnlockPdf.tsx
 create mode 100644 frontend/src/components/tools/WatermarkPdf.tsx

diff --git a/backend/app/__init__.py b/backend/app/__init__.py
index bac1dbe..3d33bf4 100644
--- a/backend/app/__init__.py
+++ b/backend/app/__init__.py
@@ -61,12 +61,14 @@ def create_app(config_name=None):
     from app.routes.video import video_bp
     from app.routes.tasks import tasks_bp
     from app.routes.download import download_bp
+    from app.routes.pdf_tools import pdf_tools_bp
 
     app.register_blueprint(health_bp, url_prefix="/api")
     app.register_blueprint(convert_bp, url_prefix="/api/convert")
     app.register_blueprint(compress_bp, url_prefix="/api/compress")
     app.register_blueprint(image_bp, url_prefix="/api/image")
     app.register_blueprint(video_bp, url_prefix="/api/video")
+    app.register_blueprint(pdf_tools_bp, url_prefix="/api/pdf-tools")
     app.register_blueprint(tasks_bp, url_prefix="/api/tasks")
     app.register_blueprint(download_bp, url_prefix="/api/download")
 
diff --git a/backend/app/extensions.py b/backend/app/extensions.py
index 6d8cf76..42446b3 100644
--- a/backend/app/extensions.py
+++ b/backend/app/extensions.py
@@ -29,6 +29,7 @@ def init_celery(app):
         "app.tasks.compress_tasks.*": {"queue": "compress"},
         "app.tasks.image_tasks.*": {"queue": "image"},
         "app.tasks.video_tasks.*": {"queue": "video"},
+        "app.tasks.pdf_tools_tasks.*": {"queue": "pdf_tools"},
     }
 
     class ContextTask(celery.Task):
diff --git a/backend/app/routes/pdf_tools.py b/backend/app/routes/pdf_tools.py
new file mode 100644
index 0000000..ba26656
--- /dev/null
+++ b/backend/app/routes/pdf_tools.py
@@ -0,0 +1,427 @@
+"""Extended PDF tool routes — Merge, Split, Rotate, Page Numbers, PDF↔Images, Watermark, Protect/Unlock."""
+import os
+import uuid
+
+from flask import Blueprint, request, jsonify
+
+from app.extensions import limiter
+from app.utils.file_validator import validate_file, FileValidationError
+from app.utils.sanitizer import generate_safe_path
+from app.tasks.pdf_tools_tasks import (
+    merge_pdfs_task,
+    split_pdf_task,
+    rotate_pdf_task,
+    add_page_numbers_task,
+    pdf_to_images_task,
+    images_to_pdf_task,
+    watermark_pdf_task,
+    protect_pdf_task,
+    unlock_pdf_task,
+)
+
+pdf_tools_bp = Blueprint("pdf_tools", __name__)
+
+ALLOWED_IMAGE_TYPES = ["png", "jpg", "jpeg", "webp"]
+
+
+# ---------------------------------------------------------------------------
+# Merge PDFs  — POST /api/pdf-tools/merge
+# ---------------------------------------------------------------------------
+@pdf_tools_bp.route("/merge", methods=["POST"])
+@limiter.limit("10/minute")
+def merge_pdfs_route():
+    """
+    Merge multiple PDF files into one.
+
+    Accepts: multipart/form-data with multiple 'files' fields (PDF)
+    Returns: JSON with task_id for polling
+    """
+    files = request.files.getlist("files")
+    if not files or len(files) < 2:
+        return jsonify({"error": "Please upload at least 2 PDF files."}), 400
+
+    if len(files) > 20:
+        return jsonify({"error": "Maximum 20 files allowed."}), 400
+
+    task_id = str(uuid.uuid4())
+    input_paths = []
+    original_filenames = []
+
+    for f in files:
+        try:
+            original_filename, ext = validate_file(f, allowed_types=["pdf"])
+        except FileValidationError as e:
+            return jsonify({"error": e.message}), e.code
+
+        upload_dir = os.path.join("/tmp/uploads", task_id)
+        os.makedirs(upload_dir, exist_ok=True)
+        file_path = os.path.join(upload_dir, f"{uuid.uuid4()}.{ext}")
+        f.save(file_path)
+        input_paths.append(file_path)
+        original_filenames.append(original_filename)
+
+    task = merge_pdfs_task.delay(input_paths, task_id, original_filenames)
+
+    return jsonify({
+        "task_id": task.id,
+        "message": "Merge started. Poll /api/tasks/{task_id}/status for progress.",
+    }), 202
+
+
+# ---------------------------------------------------------------------------
+# Split PDF  — POST /api/pdf-tools/split
+# ---------------------------------------------------------------------------
+@pdf_tools_bp.route("/split", methods=["POST"])
+@limiter.limit("10/minute")
+def split_pdf_route():
+    """
+    Split a PDF into individual pages or a specific range.
+
+    Accepts: multipart/form-data with:
+        - 'file': PDF file
+        - 'mode' (optional): "all" or "range" (default: "all")
+        - 'pages' (optional): Page spec for range mode, e.g. "1,3,5-8"
+    Returns: JSON with task_id for polling
+    """
+    if "file" not in request.files:
+        return jsonify({"error": "No file provided."}), 400
+
+    file = request.files["file"]
+    mode = request.form.get("mode", "all")
+    pages = request.form.get("pages")
+
+    if mode not in ("all", "range"):
+        mode = "all"
+
+    try:
+        original_filename, ext = validate_file(file, allowed_types=["pdf"])
+    except FileValidationError as e:
+        return jsonify({"error": e.message}), e.code
+
+    task_id, input_path = generate_safe_path(ext, folder_type="upload")
+    file.save(input_path)
+
+    task = split_pdf_task.delay(input_path, task_id, original_filename, mode, pages)
+
+    return jsonify({
+        "task_id": task.id,
+        "message": "Split started. Poll /api/tasks/{task_id}/status for progress.",
+    }), 202
+
+
+# ---------------------------------------------------------------------------
+# Rotate PDF  — POST /api/pdf-tools/rotate
+# ---------------------------------------------------------------------------
+@pdf_tools_bp.route("/rotate", methods=["POST"])
+@limiter.limit("10/minute")
+def rotate_pdf_route():
+    """
+    Rotate pages in a PDF.
+
+    Accepts: multipart/form-data with:
+        - 'file': PDF file
+        - 'rotation': Degrees — 90, 180, or 270 (default: 90)
+        - 'pages' (optional): "all" or comma-separated page numbers (default: "all")
+    Returns: JSON with task_id for polling
+    """
+    if "file" not in request.files:
+        return jsonify({"error": "No file provided."}), 400
+
+    file = request.files["file"]
+
+    try:
+        rotation = int(request.form.get("rotation", 90))
+    except ValueError:
+        rotation = 90
+
+    if rotation not in (90, 180, 270):
+        return jsonify({"error": "Rotation must be 90, 180, or 270 degrees."}), 400
+
+    pages = request.form.get("pages", "all")
+
+    try:
+        original_filename, ext = validate_file(file, allowed_types=["pdf"])
+    except FileValidationError as e:
+        return jsonify({"error": e.message}), e.code
+
+    task_id, input_path = generate_safe_path(ext, folder_type="upload")
+    file.save(input_path)
+
+    task = rotate_pdf_task.delay(input_path, task_id, original_filename, rotation, pages)
+
+    return jsonify({
+        "task_id": task.id,
+        "message": "Rotation started. Poll /api/tasks/{task_id}/status for progress.",
+    }), 202
+
+
+# ---------------------------------------------------------------------------
+# Add Page Numbers  — POST /api/pdf-tools/page-numbers
+# ---------------------------------------------------------------------------
+@pdf_tools_bp.route("/page-numbers", methods=["POST"])
+@limiter.limit("10/minute")
+def add_page_numbers_route():
+    """
+    Add page numbers to a PDF.
+
+    Accepts: multipart/form-data with:
+        - 'file': PDF file
+        - 'position' (optional): "bottom-center", "bottom-right", "bottom-left",
+                                  "top-center", "top-right", "top-left" (default: "bottom-center")
+        - 'start_number' (optional): Starting number (default: 1)
+    Returns: JSON with task_id for polling
+    """
+    if "file" not in request.files:
+        return jsonify({"error": "No file provided."}), 400
+
+    file = request.files["file"]
+    position = request.form.get("position", "bottom-center")
+    valid_positions = [
+        "bottom-center", "bottom-right", "bottom-left",
+        "top-center", "top-right", "top-left",
+    ]
+    if position not in valid_positions:
+        position = "bottom-center"
+
+    try:
+        start_number = max(1, int(request.form.get("start_number", 1)))
+    except ValueError:
+        start_number = 1
+
+    try:
+        original_filename, ext = validate_file(file, allowed_types=["pdf"])
+    except FileValidationError as e:
+        return jsonify({"error": e.message}), e.code
+
+    task_id, input_path = generate_safe_path(ext, folder_type="upload")
+    file.save(input_path)
+
+    task = add_page_numbers_task.delay(
+        input_path, task_id, original_filename, position, start_number
+    )
+
+    return jsonify({
+        "task_id": task.id,
+        "message": "Page numbering started. Poll /api/tasks/{task_id}/status for progress.",
+    }), 202
+
+
+# ---------------------------------------------------------------------------
+# PDF to Images  — POST /api/pdf-tools/pdf-to-images
+# ---------------------------------------------------------------------------
+@pdf_tools_bp.route("/pdf-to-images", methods=["POST"])
+@limiter.limit("10/minute")
+def pdf_to_images_route():
+    """
+    Convert PDF pages to images.
+
+    Accepts: multipart/form-data with:
+        - 'file': PDF file
+        - 'format' (optional): "png" or "jpg" (default: "png")
+        - 'dpi' (optional): Resolution 72-600 (default: 200)
+    Returns: JSON with task_id for polling
+    """
+    if "file" not in request.files:
+        return jsonify({"error": "No file provided."}), 400
+
+    file = request.files["file"]
+    output_format = request.form.get("format", "png").lower()
+    if output_format not in ("png", "jpg"):
+        output_format = "png"
+
+    try:
+        dpi = max(72, min(600, int(request.form.get("dpi", 200))))
+    except ValueError:
+        dpi = 200
+
+    try:
+        original_filename, ext = validate_file(file, allowed_types=["pdf"])
+    except FileValidationError as e:
+        return jsonify({"error": e.message}), e.code
+
+    task_id, input_path = generate_safe_path(ext, folder_type="upload")
+    file.save(input_path)
+
+    task = pdf_to_images_task.delay(
+        input_path, task_id, original_filename, output_format, dpi
+    )
+
+    return jsonify({
+        "task_id": task.id,
+        "message": "Conversion started. Poll /api/tasks/{task_id}/status for progress.",
+    }), 202
+
+
+# ---------------------------------------------------------------------------
+# Images to PDF  — POST /api/pdf-tools/images-to-pdf
+# ---------------------------------------------------------------------------
+@pdf_tools_bp.route("/images-to-pdf", methods=["POST"])
+@limiter.limit("10/minute")
+def images_to_pdf_route():
+    """
+    Convert multiple images to a single PDF.
+
+    Accepts: multipart/form-data with multiple 'files' fields (images)
+    Returns: JSON with task_id for polling
+    """
+    files = request.files.getlist("files")
+    if not files or len(files) < 1:
+        return jsonify({"error": "Please upload at least 1 image."}), 400
+
+    if len(files) > 50:
+        return jsonify({"error": "Maximum 50 images allowed."}), 400
+
+    task_id = str(uuid.uuid4())
+    input_paths = []
+    original_filenames = []
+
+    for f in files:
+        try:
+            original_filename, ext = validate_file(f, allowed_types=ALLOWED_IMAGE_TYPES)
+        except FileValidationError as e:
+            return jsonify({"error": e.message}), e.code
+
+        upload_dir = os.path.join("/tmp/uploads", task_id)
+        os.makedirs(upload_dir, exist_ok=True)
+        file_path = os.path.join(upload_dir, f"{uuid.uuid4()}.{ext}")
+        f.save(file_path)
+        input_paths.append(file_path)
+        original_filenames.append(original_filename)
+
+    task = images_to_pdf_task.delay(input_paths, task_id, original_filenames)
+
+    return jsonify({
+        "task_id": task.id,
+        "message": "Conversion started. Poll /api/tasks/{task_id}/status for progress.",
+    }), 202
+
+
+# ---------------------------------------------------------------------------
+# Watermark PDF  — POST /api/pdf-tools/watermark
+# ---------------------------------------------------------------------------
+@pdf_tools_bp.route("/watermark", methods=["POST"])
+@limiter.limit("10/minute")
+def watermark_pdf_route():
+    """
+    Add a text watermark to a PDF.
+
+    Accepts: multipart/form-data with:
+        - 'file': PDF file
+        - 'text': Watermark text
+        - 'opacity' (optional): 0.1-1.0 (default: 0.3)
+    Returns: JSON with task_id for polling
+    """
+    if "file" not in request.files:
+        return jsonify({"error": "No file provided."}), 400
+
+    file = request.files["file"]
+    watermark_text = request.form.get("text", "").strip()
+
+    if not watermark_text:
+        return jsonify({"error": "Watermark text is required."}), 400
+
+    if len(watermark_text) > 100:
+        return jsonify({"error": "Watermark text must be 100 characters or less."}), 400
+
+    try:
+        opacity = max(0.1, min(1.0, float(request.form.get("opacity", 0.3))))
+    except ValueError:
+        opacity = 0.3
+
+    try:
+        original_filename, ext = validate_file(file, allowed_types=["pdf"])
+    except FileValidationError as e:
+        return jsonify({"error": e.message}), e.code
+
+    task_id, input_path = generate_safe_path(ext, folder_type="upload")
+    file.save(input_path)
+
+    task = watermark_pdf_task.delay(
+        input_path, task_id, original_filename, watermark_text, opacity
+    )
+
+    return jsonify({
+        "task_id": task.id,
+        "message": "Watermarking started. Poll /api/tasks/{task_id}/status for progress.",
+    }), 202
+
+
+# ---------------------------------------------------------------------------
+# Protect PDF  — POST /api/pdf-tools/protect
+# ---------------------------------------------------------------------------
+@pdf_tools_bp.route("/protect", methods=["POST"])
+@limiter.limit("10/minute")
+def protect_pdf_route():
+    """
+    Add password protection to a PDF.
+
+    Accepts: multipart/form-data with:
+        - 'file': PDF file
+        - 'password': Password to set
+    Returns: JSON with task_id for polling
+    """
+    if "file" not in request.files:
+        return jsonify({"error": "No file provided."}), 400
+
+    file = request.files["file"]
+    password = request.form.get("password", "").strip()
+
+    if not password:
+        return jsonify({"error": "Password is required."}), 400
+
+    if len(password) < 4:
+        return jsonify({"error": "Password must be at least 4 characters."}), 400
+
+    try:
+        original_filename, ext = validate_file(file, allowed_types=["pdf"])
+    except FileValidationError as e:
+        return jsonify({"error": e.message}), e.code
+
+    task_id, input_path = generate_safe_path(ext, folder_type="upload")
+    file.save(input_path)
+
+    task = protect_pdf_task.delay(input_path, task_id, original_filename, password)
+
+    return jsonify({
+        "task_id": task.id,
+        "message": "Protection started. Poll /api/tasks/{task_id}/status for progress.",
+    }), 202
+
+
+# ---------------------------------------------------------------------------
+# Unlock PDF  — POST /api/pdf-tools/unlock
+# ---------------------------------------------------------------------------
+@pdf_tools_bp.route("/unlock", methods=["POST"])
+@limiter.limit("10/minute")
+def unlock_pdf_route():
+    """
+    Remove password protection from a PDF.
+
+    Accepts: multipart/form-data with:
+        - 'file': PDF file
+        - 'password': Current password of the PDF
+    Returns: JSON with task_id for polling
+    """
+    if "file" not in request.files:
+        return jsonify({"error": "No file provided."}), 400
+
+    file = request.files["file"]
+    password = request.form.get("password", "").strip()
+
+    if not password:
+        return jsonify({"error": "Password is required."}), 400
+
+    try:
+        original_filename, ext = validate_file(file, allowed_types=["pdf"])
+    except FileValidationError as e:
+        return jsonify({"error": e.message}), e.code
+
+    task_id, input_path = generate_safe_path(ext, folder_type="upload")
+    file.save(input_path)
+
+    task = unlock_pdf_task.delay(input_path, task_id, original_filename, password)
+
+    return jsonify({
+        "task_id": task.id,
+        "message": "Unlock started. Poll /api/tasks/{task_id}/status for progress.",
+    }), 202
diff --git a/backend/app/services/pdf_tools_service.py b/backend/app/services/pdf_tools_service.py
new file mode 100644
index 0000000..9332a32
--- /dev/null
+++ b/backend/app/services/pdf_tools_service.py
@@ -0,0 +1,652 @@
+"""Extended PDF tools service — Merge, Split, Rotate, Page Numbers, PDF↔Images."""
+import os
+import io
+import logging
+import subprocess
+import tempfile
+import zipfile
+
+from PIL import Image
+
+logger = logging.getLogger(__name__)
+
+
+class PDFToolsError(Exception):
+    """Custom exception for PDF tools failures."""
+    pass
+
+
+# ---------------------------------------------------------------------------
+# 1. Merge PDFs
+# ---------------------------------------------------------------------------
+def merge_pdfs(input_paths: list[str], output_path: str) -> dict:
+    """
+    Merge multiple PDF files into a single PDF.
+
+    Args:
+        input_paths: List of paths to PDF files (in order)
+        output_path: Path for the merged output PDF
+
+    Returns:
+        dict with total_pages and output_size
+
+    Raises:
+        PDFToolsError: If merge fails
+    """
+    try:
+        from PyPDF2 import PdfReader, PdfWriter
+
+        writer = PdfWriter()
+        total_pages = 0
+
+        for path in input_paths:
+            if not os.path.exists(path):
+                raise PDFToolsError(f"File not found: {os.path.basename(path)}")
+            reader = PdfReader(path)
+            for page in reader.pages:
+                writer.add_page(page)
+                total_pages += 1
+
+        os.makedirs(os.path.dirname(output_path), exist_ok=True)
+        with open(output_path, "wb") as f:
+            writer.write(f)
+
+        output_size = os.path.getsize(output_path)
+        logger.info(f"Merged {len(input_paths)} PDFs → {total_pages} pages ({output_size} bytes)")
+
+        return {
+            "total_pages": total_pages,
+            "files_merged": len(input_paths),
+            "output_size": output_size,
+        }
+
+    except PDFToolsError:
+        raise
+    except Exception as e:
+        raise PDFToolsError(f"Failed to merge PDFs: {str(e)}")
+
+
+# ---------------------------------------------------------------------------
+# 2. Split PDF
+# ---------------------------------------------------------------------------
+def split_pdf(
+    input_path: str,
+    output_dir: str,
+    mode: str = "all",
+    pages: str | None = None,
+) -> dict:
+    """
+    Split a PDF into individual pages or a specific range.
+
+    Args:
+        input_path: Path to the input PDF
+        output_dir: Directory for the output files
+        mode: "all" (every page) or "range" (specific pages)
+        pages: Page specification for range mode, e.g. "1,3,5-8"
+
+    Returns:
+        dict with output_files list, total_pages, and zip_path
+
+    Raises:
+        PDFToolsError: If split fails
+    """
+    try:
+        from PyPDF2 import PdfReader, PdfWriter
+
+        os.makedirs(output_dir, exist_ok=True)
+        reader = PdfReader(input_path)
+        total_pages = len(reader.pages)
+
+        if total_pages == 0:
+            raise PDFToolsError("PDF has no pages.")
+
+        # Determine which pages to extract
+        if mode == "range" and pages:
+            page_indices = _parse_page_range(pages, total_pages)
+        else:
+            page_indices = list(range(total_pages))
+
+        output_files = []
+        for idx in page_indices:
+            writer = PdfWriter()
+            writer.add_page(reader.pages[idx])
+
+            page_num = idx + 1
+            out_path = os.path.join(output_dir, f"page_{page_num}.pdf")
+            with open(out_path, "wb") as f:
+                writer.write(f)
+            output_files.append(out_path)
+
+        # Create a ZIP of all output files
+        zip_path = os.path.join(output_dir, "split_pages.zip")
+        with zipfile.ZipFile(zip_path, "w", zipfile.ZIP_DEFLATED) as zf:
+            for fpath in output_files:
+                zf.write(fpath, os.path.basename(fpath))
+
+        logger.info(f"Split PDF: {total_pages} pages → {len(output_files)} files")
+
+        return {
+            "total_pages": total_pages,
+            "extracted_pages": len(output_files),
+            "output_size": os.path.getsize(zip_path),
+            "zip_path": zip_path,
+        }
+
+    except PDFToolsError:
+        raise
+    except Exception as e:
+        raise PDFToolsError(f"Failed to split PDF: {str(e)}")
+
+
+def _parse_page_range(spec: str, total: int) -> list[int]:
+    """Parse a page specification like '1,3,5-8' into 0-based indices."""
+    indices = set()
+    for part in spec.split(","):
+        part = part.strip()
+        if "-" in part:
+            start_s, end_s = part.split("-", 1)
+            start = max(1, int(start_s.strip()))
+            end = min(total, int(end_s.strip()))
+            indices.update(range(start - 1, end))
+        else:
+            page = int(part)
+            if 1 <= page <= total:
+                indices.add(page - 1)
+    if not indices:
+        raise PDFToolsError("No valid pages specified.")
+    return sorted(indices)
+
+
+# ---------------------------------------------------------------------------
+# 3. Rotate PDF
+# ---------------------------------------------------------------------------
+def rotate_pdf(
+    input_path: str,
+    output_path: str,
+    rotation: int = 90,
+    pages: str = "all",
+) -> dict:
+    """
+    Rotate pages in a PDF.
+
+    Args:
+        input_path: Path to the input PDF
+        output_path: Path for the rotated output PDF
+        rotation: Degrees to rotate (90, 180, 270)
+        pages: "all" or comma-separated page numbers (1-based)
+
+    Returns:
+        dict with total_pages and rotated_pages
+
+    Raises:
+        PDFToolsError: If rotation fails
+    """
+    if rotation not in (90, 180, 270):
+        raise PDFToolsError("Rotation must be 90, 180, or 270 degrees.")
+
+    try:
+        from PyPDF2 import PdfReader, PdfWriter
+
+        reader = PdfReader(input_path)
+        writer = PdfWriter()
+        total_pages = len(reader.pages)
+
+        # Determine which pages to rotate
+        if pages == "all":
+            rotate_indices = set(range(total_pages))
+        else:
+            rotate_indices = set()
+            for part in pages.split(","):
+                part = part.strip()
+                page = int(part)
+                if 1 <= page <= total_pages:
+                    rotate_indices.add(page - 1)
+
+        rotated_count = 0
+        for i, page in enumerate(reader.pages):
+            if i in rotate_indices:
+                page.rotate(rotation)
+                rotated_count += 1
+            writer.add_page(page)
+
+        os.makedirs(os.path.dirname(output_path), exist_ok=True)
+        with open(output_path, "wb") as f:
+            writer.write(f)
+
+        logger.info(f"Rotated {rotated_count}/{total_pages} pages by {rotation}°")
+
+        return {
+            "total_pages": total_pages,
+            "rotated_pages": rotated_count,
+            "rotation": rotation,
+            "output_size": os.path.getsize(output_path),
+        }
+
+    except PDFToolsError:
+        raise
+    except Exception as e:
+        raise PDFToolsError(f"Failed to rotate PDF: {str(e)}")
+
+
+# ---------------------------------------------------------------------------
+# 4. Add Page Numbers
+# ---------------------------------------------------------------------------
+def add_page_numbers(
+    input_path: str,
+    output_path: str,
+    position: str = "bottom-center",
+    start_number: int = 1,
+) -> dict:
+    """
+    Add page numbers to a PDF.
+
+    Args:
+        input_path: Path to the input PDF
+        output_path: Path for the numbered output PDF
+        position: Number position — "bottom-center", "bottom-right", "bottom-left",
+                  "top-center", "top-right", "top-left"
+        start_number: Starting page number
+
+    Returns:
+        dict with total_pages and output_size
+
+    Raises:
+        PDFToolsError: If numbering fails
+    """
+    try:
+        from PyPDF2 import PdfReader, PdfWriter
+        from reportlab.pdfgen import canvas
+        from reportlab.lib.units import mm
+
+        reader = PdfReader(input_path)
+        writer = PdfWriter()
+        total_pages = len(reader.pages)
+
+        for i, page in enumerate(reader.pages):
+            page_num = start_number + i
+            page_width = float(page.mediabox.width)
+            page_height = float(page.mediabox.height)
+
+            # Create overlay with page number
+            packet = io.BytesIO()
+            c = canvas.Canvas(packet, pagesize=(page_width, page_height))
+            c.setFont("Helvetica", 10)
+
+            # Calculate position
+            x, y = _get_number_position(position, page_width, page_height)
+            c.drawCentredString(x, y, str(page_num))
+            c.save()
+            packet.seek(0)
+
+            # Merge overlay onto original page
+            from PyPDF2 import PdfReader as OverlayReader
+            overlay = OverlayReader(packet)
+            page.merge_page(overlay.pages[0])
+            writer.add_page(page)
+
+        os.makedirs(os.path.dirname(output_path), exist_ok=True)
+        with open(output_path, "wb") as f:
+            writer.write(f)
+
+        logger.info(f"Added page numbers to {total_pages} pages")
+
+        return {
+            "total_pages": total_pages,
+            "output_size": os.path.getsize(output_path),
+        }
+
+    except PDFToolsError:
+        raise
+    except Exception as e:
+        raise PDFToolsError(f"Failed to add page numbers: {str(e)}")
+
+
+def _get_number_position(
+    position: str, page_width: float, page_height: float
+) -> tuple[float, float]:
+    """Calculate x, y coordinates for the page number text."""
+    margin = 30  # points from edge
+
+    positions = {
+        "bottom-center": (page_width / 2, margin),
+        "bottom-right": (page_width - margin, margin),
+        "bottom-left": (margin, margin),
+        "top-center": (page_width / 2, page_height - margin),
+        "top-right": (page_width - margin, page_height - margin),
+        "top-left": (margin, page_height - margin),
+    }
+
+    return positions.get(position, positions["bottom-center"])
+
+
+# ---------------------------------------------------------------------------
+# 5. PDF to Images
+# ---------------------------------------------------------------------------
+def pdf_to_images(
+    input_path: str,
+    output_dir: str,
+    output_format: str = "png",
+    dpi: int = 200,
+) -> dict:
+    """
+    Convert each page of a PDF to an image.
+
+    Args:
+        input_path: Path to the input PDF
+        output_dir: Directory for output images
+        output_format: "png" or "jpg"
+        dpi: Resolution (72-600)
+
+    Returns:
+        dict with page_count, output_files, zip_path, output_size
+
+    Raises:
+        PDFToolsError: If conversion fails
+    """
+    if output_format not in ("png", "jpg", "jpeg"):
+        output_format = "png"
+    if output_format == "jpeg":
+        output_format = "jpg"
+
+    dpi = max(72, min(600, dpi))
+
+    try:
+        from pdf2image import convert_from_path
+
+        os.makedirs(output_dir, exist_ok=True)
+
+        images = convert_from_path(input_path, dpi=dpi)
+        output_files = []
+
+        for i, img in enumerate(images):
+            page_num = i + 1
+            out_path = os.path.join(output_dir, f"page_{page_num}.{output_format}")
+
+            if output_format == "jpg":
+                # Convert to RGB for JPEG
+                if img.mode in ("RGBA", "P", "LA"):
+                    bg = Image.new("RGB", img.size, (255, 255, 255))
+                    if img.mode == "P":
+                        img = img.convert("RGBA")
+                    bg.paste(img, mask=img.split()[-1] if "A" in img.mode else None)
+                    img = bg
+                img.save(out_path, "JPEG", quality=90, optimize=True)
+            else:
+                img.save(out_path, "PNG", optimize=True)
+
+            output_files.append(out_path)
+
+        # Create ZIP of all images
+        zip_path = os.path.join(output_dir, "pdf_images.zip")
+        with zipfile.ZipFile(zip_path, "w", zipfile.ZIP_DEFLATED) as zf:
+            for fpath in output_files:
+                zf.write(fpath, os.path.basename(fpath))
+
+        logger.info(f"PDF→Images: {len(images)} pages → {output_format.upper()} @ {dpi} DPI")
+
+        return {
+            "page_count": len(images),
+            "format": output_format,
+            "dpi": dpi,
+            "output_size": os.path.getsize(zip_path),
+            "zip_path": zip_path,
+        }
+
+    except ImportError:
+        raise PDFToolsError(
+            "pdf2image is not installed. Install it with: pip install pdf2image"
+        )
+    except Exception as e:
+        raise PDFToolsError(f"Failed to convert PDF to images: {str(e)}")
+
+
+# ---------------------------------------------------------------------------
+# 6. Images to PDF
+# ---------------------------------------------------------------------------
+def images_to_pdf(input_paths: list[str], output_path: str) -> dict:
+    """
+    Combine multiple images into a single PDF.
+
+    Args:
+        input_paths: List of paths to image files (in order)
+        output_path: Path for the output PDF
+
+    Returns:
+        dict with page_count and output_size
+
+    Raises:
+        PDFToolsError: If conversion fails
+    """
+    try:
+        os.makedirs(os.path.dirname(output_path), exist_ok=True)
+
+        images = []
+        for path in input_paths:
+            if not os.path.exists(path):
+                raise PDFToolsError(f"Image not found: {os.path.basename(path)}")
+            img = Image.open(path)
+            # Convert to RGB (required for PDF)
+            if img.mode in ("RGBA", "P", "LA"):
+                bg = Image.new("RGB", img.size, (255, 255, 255))
+                if img.mode == "P":
+                    img = img.convert("RGBA")
+                bg.paste(img, mask=img.split()[-1] if "A" in img.mode else None)
+                img = bg
+            elif img.mode != "RGB":
+                img = img.convert("RGB")
+            images.append(img)
+
+        if not images:
+            raise PDFToolsError("No valid images provided.")
+
+        # Save all images as a single PDF
+        images[0].save(
+            output_path,
+            "PDF",
+            save_all=True,
+            append_images=images[1:],
+            resolution=150,
+        )
+
+        # Close images
+        for img in images:
+            img.close()
+
+        output_size = os.path.getsize(output_path)
+        logger.info(f"Images→PDF: {len(input_paths)} images → {output_size} bytes")
+
+        return {
+            "page_count": len(input_paths),
+            "output_size": output_size,
+        }
+
+    except PDFToolsError:
+        raise
+    except Exception as e:
+        raise PDFToolsError(f"Failed to create PDF from images: {str(e)}")
+
+
+# ---------------------------------------------------------------------------
+# 7. Watermark PDF
+# ---------------------------------------------------------------------------
+def add_watermark(
+    input_path: str,
+    output_path: str,
+    watermark_text: str,
+    opacity: float = 0.3,
+    font_size: int = 50,
+    rotation: int = 45,
+) -> dict:
+    """
+    Add a text watermark to every page of a PDF.
+
+    Args:
+        input_path: Path to the input PDF
+        output_path: Path for the watermarked output PDF
+        watermark_text: Text to use as watermark
+        opacity: Watermark opacity (0.0-1.0)
+        font_size: Font size for watermark text
+        rotation: Rotation angle in degrees
+
+    Returns:
+        dict with total_pages and output_size
+
+    Raises:
+        PDFToolsError: If watermarking fails
+    """
+    try:
+        from PyPDF2 import PdfReader, PdfWriter
+        from reportlab.pdfgen import canvas
+        from reportlab.lib.colors import Color
+
+        reader = PdfReader(input_path)
+        writer = PdfWriter()
+        total_pages = len(reader.pages)
+
+        for page in reader.pages:
+            page_width = float(page.mediabox.width)
+            page_height = float(page.mediabox.height)
+
+            # Create watermark overlay
+            packet = io.BytesIO()
+            c = canvas.Canvas(packet, pagesize=(page_width, page_height))
+
+            # Set watermark properties
+            c.setFont("Helvetica", font_size)
+            c.setFillColor(Color(0.5, 0.5, 0.5, alpha=opacity))
+
+            # Draw rotated watermark text at center
+            c.saveState()
+            c.translate(page_width / 2, page_height / 2)
+            c.rotate(rotation)
+            c.drawCentredString(0, 0, watermark_text)
+            c.restoreState()
+
+            c.save()
+            packet.seek(0)
+
+            from PyPDF2 import PdfReader as OverlayReader
+            overlay = OverlayReader(packet)
+            page.merge_page(overlay.pages[0])
+            writer.add_page(page)
+
+        os.makedirs(os.path.dirname(output_path), exist_ok=True)
+        with open(output_path, "wb") as f:
+            writer.write(f)
+
+        logger.info(f"Added watermark '{watermark_text}' to {total_pages} pages")
+
+        return {
+            "total_pages": total_pages,
+            "output_size": os.path.getsize(output_path),
+        }
+
+    except PDFToolsError:
+        raise
+    except Exception as e:
+        raise PDFToolsError(f"Failed to add watermark: {str(e)}")
+
+
+# ---------------------------------------------------------------------------
+# 8. Protect PDF (add password)
+# ---------------------------------------------------------------------------
+def protect_pdf(
+    input_path: str,
+    output_path: str,
+    password: str,
+) -> dict:
+    """
+    Add password protection to a PDF.
+
+    Args:
+        input_path: Path to the input PDF
+        output_path: Path for the protected output PDF
+        password: Password to set
+
+    Returns:
+        dict with total_pages and output_size
+
+    Raises:
+        PDFToolsError: If protection fails
+    """
+    try:
+        from PyPDF2 import PdfReader, PdfWriter
+
+        reader = PdfReader(input_path)
+        writer = PdfWriter()
+        total_pages = len(reader.pages)
+
+        for page in reader.pages:
+            writer.add_page(page)
+
+        writer.encrypt(password)
+
+        os.makedirs(os.path.dirname(output_path), exist_ok=True)
+        with open(output_path, "wb") as f:
+            writer.write(f)
+
+        logger.info(f"Protected PDF with password ({total_pages} pages)")
+
+        return {
+            "total_pages": total_pages,
+            "output_size": os.path.getsize(output_path),
+        }
+
+    except Exception as e:
+        raise PDFToolsError(f"Failed to protect PDF: {str(e)}")
+
+
+# ---------------------------------------------------------------------------
+# 9. Unlock PDF (remove password)
+# ---------------------------------------------------------------------------
+def unlock_pdf(
+    input_path: str,
+    output_path: str,
+    password: str,
+) -> dict:
+    """
+    Remove password protection from a PDF.
+
+    Args:
+        input_path: Path to the input PDF
+        output_path: Path for the unlocked output PDF
+        password: Current password of the PDF
+
+    Returns:
+        dict with total_pages and output_size
+
+    Raises:
+        PDFToolsError: If unlock fails
+    """
+    try:
+        from PyPDF2 import PdfReader, PdfWriter
+
+        reader = PdfReader(input_path)
+
+        if reader.is_encrypted:
+            if not reader.decrypt(password):
+                raise PDFToolsError("Incorrect password.")
+        else:
+            raise PDFToolsError("PDF is not password-protected.")
+
+        writer = PdfWriter()
+        total_pages = len(reader.pages)
+
+        for page in reader.pages:
+            writer.add_page(page)
+
+        os.makedirs(os.path.dirname(output_path), exist_ok=True)
+        with open(output_path, "wb") as f:
+            writer.write(f)
+
+        logger.info(f"Unlocked PDF ({total_pages} pages)")
+
+        return {
+            "total_pages": total_pages,
+            "output_size": os.path.getsize(output_path),
+        }
+
+    except PDFToolsError:
+        raise
+    except Exception as e:
+        raise PDFToolsError(f"Failed to unlock PDF: {str(e)}")
diff --git a/backend/app/tasks/pdf_tools_tasks.py b/backend/app/tasks/pdf_tools_tasks.py
new file mode 100644
index 0000000..ff55c61
--- /dev/null
+++ b/backend/app/tasks/pdf_tools_tasks.py
@@ -0,0 +1,438 @@
+"""Celery tasks for extended PDF tools (merge, split, rotate, etc.)."""
+import os
+import logging
+
+from app.extensions import celery
+from app.services.pdf_tools_service import (
+    merge_pdfs,
+    split_pdf,
+    rotate_pdf,
+    add_page_numbers,
+    pdf_to_images,
+    images_to_pdf,
+    add_watermark,
+    protect_pdf,
+    unlock_pdf,
+    PDFToolsError,
+)
+from app.services.storage_service import storage
+from app.utils.sanitizer import cleanup_task_files
+
+
+def _cleanup(task_id: str):
+    cleanup_task_files(task_id, keep_outputs=not storage.use_s3)
+
+
+logger = logging.getLogger(__name__)
+
+
+# ---------------------------------------------------------------------------
+# Merge PDFs
+# ---------------------------------------------------------------------------
+@celery.task(bind=True, name="app.tasks.pdf_tools_tasks.merge_pdfs_task")
+def merge_pdfs_task(
+    self, input_paths: list[str], task_id: str, original_filenames: list[str]
+):
+    """Async task: Merge multiple PDFs into one."""
+    output_dir = os.path.join("/tmp/outputs", task_id)
+    os.makedirs(output_dir, exist_ok=True)
+    output_path = os.path.join(output_dir, f"{task_id}_merged.pdf")
+
+    try:
+        self.update_state(state="PROCESSING", meta={"step": "Merging PDFs..."})
+        stats = merge_pdfs(input_paths, output_path)
+
+        self.update_state(state="PROCESSING", meta={"step": "Uploading result..."})
+        s3_key = storage.upload_file(output_path, task_id, folder="outputs")
+        download_name = "merged.pdf"
+        download_url = storage.generate_presigned_url(s3_key, original_filename=download_name)
+
+        result = {
+            "status": "completed",
+            "download_url": download_url,
+            "filename": download_name,
+            "total_pages": stats["total_pages"],
+            "files_merged": stats["files_merged"],
+            "output_size": stats["output_size"],
+        }
+
+        _cleanup(task_id)
+        logger.info(f"Task {task_id}: Merge completed — {stats['files_merged']} files, {stats['total_pages']} pages")
+        return result
+
+    except PDFToolsError as e:
+        logger.error(f"Task {task_id}: Merge error — {e}")
+        _cleanup(task_id)
+        return {"status": "failed", "error": str(e)}
+    except Exception as e:
+        logger.error(f"Task {task_id}: Unexpected error — {e}")
+        _cleanup(task_id)
+        return {"status": "failed", "error": "An unexpected error occurred."}
+
+
+# ---------------------------------------------------------------------------
+# Split PDF
+# ---------------------------------------------------------------------------
+@celery.task(bind=True, name="app.tasks.pdf_tools_tasks.split_pdf_task")
+def split_pdf_task(
+    self, input_path: str, task_id: str, original_filename: str,
+    mode: str = "all", pages: str | None = None,
+):
+    """Async task: Split a PDF into individual pages."""
+    output_dir = os.path.join("/tmp/outputs", task_id)
+
+    try:
+        self.update_state(state="PROCESSING", meta={"step": "Splitting PDF..."})
+        stats = split_pdf(input_path, output_dir, mode=mode, pages=pages)
+
+        self.update_state(state="PROCESSING", meta={"step": "Uploading result..."})
+        zip_path = stats["zip_path"]
+        s3_key = storage.upload_file(zip_path, task_id, folder="outputs")
+
+        name_without_ext = os.path.splitext(original_filename)[0]
+        download_name = f"{name_without_ext}_split.zip"
+        download_url = storage.generate_presigned_url(s3_key, original_filename=download_name)
+
+        result = {
+            "status": "completed",
+            "download_url": download_url,
+            "filename": download_name,
+            "total_pages": stats["total_pages"],
+            "extracted_pages": stats["extracted_pages"],
+            "output_size": stats["output_size"],
+        }
+
+        _cleanup(task_id)
+        logger.info(f"Task {task_id}: Split completed — {stats['extracted_pages']} pages extracted")
+        return result
+
+    except PDFToolsError as e:
+        logger.error(f"Task {task_id}: Split error — {e}")
+        _cleanup(task_id)
+        return {"status": "failed", "error": str(e)}
+    except Exception as e:
+        logger.error(f"Task {task_id}: Unexpected error — {e}")
+        _cleanup(task_id)
+        return {"status": "failed", "error": "An unexpected error occurred."}
+
+
+# ---------------------------------------------------------------------------
+# Rotate PDF
+# ---------------------------------------------------------------------------
+@celery.task(bind=True, name="app.tasks.pdf_tools_tasks.rotate_pdf_task")
+def rotate_pdf_task(
+    self, input_path: str, task_id: str, original_filename: str,
+    rotation: int = 90, pages: str = "all",
+):
+    """Async task: Rotate pages in a PDF."""
+    output_dir = os.path.join("/tmp/outputs", task_id)
+    os.makedirs(output_dir, exist_ok=True)
+    output_path = os.path.join(output_dir, f"{task_id}_rotated.pdf")
+
+    try:
+        self.update_state(state="PROCESSING", meta={"step": f"Rotating PDF by {rotation}°..."})
+        stats = rotate_pdf(input_path, output_path, rotation=rotation, pages=pages)
+
+        self.update_state(state="PROCESSING", meta={"step": "Uploading result..."})
+        s3_key = storage.upload_file(output_path, task_id, folder="outputs")
+
+        name_without_ext = os.path.splitext(original_filename)[0]
+        download_name = f"{name_without_ext}_rotated.pdf"
+        download_url = storage.generate_presigned_url(s3_key, original_filename=download_name)
+
+        result = {
+            "status": "completed",
+            "download_url": download_url,
+            "filename": download_name,
+            "total_pages": stats["total_pages"],
+            "rotated_pages": stats["rotated_pages"],
+            "rotation": stats["rotation"],
+            "output_size": stats["output_size"],
+        }
+
+        _cleanup(task_id)
+        logger.info(f"Task {task_id}: Rotate completed — {stats['rotated_pages']} pages")
+        return result
+
+    except PDFToolsError as e:
+        logger.error(f"Task {task_id}: Rotate error — {e}")
+        _cleanup(task_id)
+        return {"status": "failed", "error": str(e)}
+    except Exception as e:
+        logger.error(f"Task {task_id}: Unexpected error — {e}")
+        _cleanup(task_id)
+        return {"status": "failed", "error": "An unexpected error occurred."}
+
+
+# ---------------------------------------------------------------------------
+# Add Page Numbers
+# ---------------------------------------------------------------------------
+@celery.task(bind=True, name="app.tasks.pdf_tools_tasks.add_page_numbers_task")
+def add_page_numbers_task(
+    self, input_path: str, task_id: str, original_filename: str,
+    position: str = "bottom-center", start_number: int = 1,
+):
+    """Async task: Add page numbers to a PDF."""
+    output_dir = os.path.join("/tmp/outputs", task_id)
+    os.makedirs(output_dir, exist_ok=True)
+    output_path = os.path.join(output_dir, f"{task_id}_numbered.pdf")
+
+    try:
+        self.update_state(state="PROCESSING", meta={"step": "Adding page numbers..."})
+        stats = add_page_numbers(input_path, output_path, position=position, start_number=start_number)
+
+        self.update_state(state="PROCESSING", meta={"step": "Uploading result..."})
+        s3_key = storage.upload_file(output_path, task_id, folder="outputs")
+
+        name_without_ext = os.path.splitext(original_filename)[0]
+        download_name = f"{name_without_ext}_numbered.pdf"
+        download_url = storage.generate_presigned_url(s3_key, original_filename=download_name)
+
+        result = {
+            "status": "completed",
+            "download_url": download_url,
+            "filename": download_name,
+            "total_pages": stats["total_pages"],
+            "output_size": stats["output_size"],
+        }
+
+        _cleanup(task_id)
+        logger.info(f"Task {task_id}: Page numbers added to {stats['total_pages']} pages")
+        return result
+
+    except PDFToolsError as e:
+        logger.error(f"Task {task_id}: Page numbers error — {e}")
+        _cleanup(task_id)
+        return {"status": "failed", "error": str(e)}
+    except Exception as e:
+        logger.error(f"Task {task_id}: Unexpected error — {e}")
+        _cleanup(task_id)
+        return {"status": "failed", "error": "An unexpected error occurred."}
+
+
+# ---------------------------------------------------------------------------
+# PDF to Images
+# ---------------------------------------------------------------------------
+@celery.task(bind=True, name="app.tasks.pdf_tools_tasks.pdf_to_images_task")
+def pdf_to_images_task(
+    self, input_path: str, task_id: str, original_filename: str,
+    output_format: str = "png", dpi: int = 200,
+):
+    """Async task: Convert PDF pages to images."""
+    output_dir = os.path.join("/tmp/outputs", task_id)
+
+    try:
+        self.update_state(state="PROCESSING", meta={"step": "Converting PDF to images..."})
+        stats = pdf_to_images(input_path, output_dir, output_format=output_format, dpi=dpi)
+
+        self.update_state(state="PROCESSING", meta={"step": "Uploading result..."})
+        zip_path = stats["zip_path"]
+        s3_key = storage.upload_file(zip_path, task_id, folder="outputs")
+
+        name_without_ext = os.path.splitext(original_filename)[0]
+        download_name = f"{name_without_ext}_images.zip"
+        download_url = storage.generate_presigned_url(s3_key, original_filename=download_name)
+
+        result = {
+            "status": "completed",
+            "download_url": download_url,
+            "filename": download_name,
+            "page_count": stats["page_count"],
+            "format": stats["format"],
+            "dpi": stats["dpi"],
+            "output_size": stats["output_size"],
+        }
+
+        _cleanup(task_id)
+        logger.info(f"Task {task_id}: PDF→Images completed — {stats['page_count']} pages")
+        return result
+
+    except PDFToolsError as e:
+        logger.error(f"Task {task_id}: PDF→Images error — {e}")
+        _cleanup(task_id)
+        return {"status": "failed", "error": str(e)}
+    except Exception as e:
+        logger.error(f"Task {task_id}: Unexpected error — {e}")
+        _cleanup(task_id)
+        return {"status": "failed", "error": "An unexpected error occurred."}
+
+
+# ---------------------------------------------------------------------------
+# Images to PDF
+# ---------------------------------------------------------------------------
+@celery.task(bind=True, name="app.tasks.pdf_tools_tasks.images_to_pdf_task")
+def images_to_pdf_task(
+    self, input_paths: list[str], task_id: str, original_filenames: list[str]
+):
+    """Async task: Combine images into a PDF."""
+    output_dir = os.path.join("/tmp/outputs", task_id)
+    os.makedirs(output_dir, exist_ok=True)
+    output_path = os.path.join(output_dir, f"{task_id}_images.pdf")
+
+    try:
+        self.update_state(state="PROCESSING", meta={"step": "Creating PDF from images..."})
+        stats = images_to_pdf(input_paths, output_path)
+
+        self.update_state(state="PROCESSING", meta={"step": "Uploading result..."})
+        s3_key = storage.upload_file(output_path, task_id, folder="outputs")
+        download_name = "images_combined.pdf"
+        download_url = storage.generate_presigned_url(s3_key, original_filename=download_name)
+
+        result = {
+            "status": "completed",
+            "download_url": download_url,
+            "filename": download_name,
+            "page_count": stats["page_count"],
+            "output_size": stats["output_size"],
+        }
+
+        _cleanup(task_id)
+        logger.info(f"Task {task_id}: Images→PDF completed — {stats['page_count']} pages")
+        return result
+
+    except PDFToolsError as e:
+        logger.error(f"Task {task_id}: Images→PDF error — {e}")
+        _cleanup(task_id)
+        return {"status": "failed", "error": str(e)}
+    except Exception as e:
+        logger.error(f"Task {task_id}: Unexpected error — {e}")
+        _cleanup(task_id)
+        return {"status": "failed", "error": "An unexpected error occurred."}
+
+
+# ---------------------------------------------------------------------------
+# Watermark PDF
+# ---------------------------------------------------------------------------
+@celery.task(bind=True, name="app.tasks.pdf_tools_tasks.watermark_pdf_task")
+def watermark_pdf_task(
+    self, input_path: str, task_id: str, original_filename: str,
+    watermark_text: str, opacity: float = 0.3,
+):
+    """Async task: Add watermark to a PDF."""
+    output_dir = os.path.join("/tmp/outputs", task_id)
+    os.makedirs(output_dir, exist_ok=True)
+    output_path = os.path.join(output_dir, f"{task_id}_watermarked.pdf")
+
+    try:
+        self.update_state(state="PROCESSING", meta={"step": "Adding watermark..."})
+        stats = add_watermark(input_path, output_path, watermark_text=watermark_text, opacity=opacity)
+
+        self.update_state(state="PROCESSING", meta={"step": "Uploading result..."})
+        s3_key = storage.upload_file(output_path, task_id, folder="outputs")
+
+        name_without_ext = os.path.splitext(original_filename)[0]
+        download_name = f"{name_without_ext}_watermarked.pdf"
+        download_url = storage.generate_presigned_url(s3_key, original_filename=download_name)
+
+        result = {
+            "status": "completed",
+            "download_url": download_url,
+            "filename": download_name,
+            "total_pages": stats["total_pages"],
+            "output_size": stats["output_size"],
+        }
+
+        _cleanup(task_id)
+        logger.info(f"Task {task_id}: Watermark added")
+        return result
+
+    except PDFToolsError as e:
+        logger.error(f"Task {task_id}: Watermark error — {e}")
+        _cleanup(task_id)
+        return {"status": "failed", "error": str(e)}
+    except Exception as e:
+        logger.error(f"Task {task_id}: Unexpected error — {e}")
+        _cleanup(task_id)
+        return {"status": "failed", "error": "An unexpected error occurred."}
+
+
+# ---------------------------------------------------------------------------
+# Protect PDF
+# ---------------------------------------------------------------------------
+@celery.task(bind=True, name="app.tasks.pdf_tools_tasks.protect_pdf_task")
+def protect_pdf_task(
+    self, input_path: str, task_id: str, original_filename: str,
+    password: str,
+):
+    """Async task: Add password protection to a PDF."""
+    output_dir = os.path.join("/tmp/outputs", task_id)
+    os.makedirs(output_dir, exist_ok=True)
+    output_path = os.path.join(output_dir, f"{task_id}_protected.pdf")
+
+    try:
+        self.update_state(state="PROCESSING", meta={"step": "Protecting PDF..."})
+        stats = protect_pdf(input_path, output_path, password=password)
+
+        self.update_state(state="PROCESSING", meta={"step": "Uploading result..."})
+        s3_key = storage.upload_file(output_path, task_id, folder="outputs")
+
+        name_without_ext = os.path.splitext(original_filename)[0]
+        download_name = f"{name_without_ext}_protected.pdf"
+        download_url = storage.generate_presigned_url(s3_key, original_filename=download_name)
+
+        result = {
+            "status": "completed",
+            "download_url": download_url,
+            "filename": download_name,
+            "total_pages": stats["total_pages"],
+            "output_size": stats["output_size"],
+        }
+
+        _cleanup(task_id)
+        logger.info(f"Task {task_id}: PDF protected")
+        return result
+
+    except PDFToolsError as e:
+        logger.error(f"Task {task_id}: Protect error — {e}")
+        _cleanup(task_id)
+        return {"status": "failed", "error": str(e)}
+    except Exception as e:
+        logger.error(f"Task {task_id}: Unexpected error — {e}")
+        _cleanup(task_id)
+        return {"status": "failed", "error": "An unexpected error occurred."}
+
+
+# ---------------------------------------------------------------------------
+# Unlock PDF
+# ---------------------------------------------------------------------------
+@celery.task(bind=True, name="app.tasks.pdf_tools_tasks.unlock_pdf_task")
+def unlock_pdf_task(
+    self, input_path: str, task_id: str, original_filename: str,
+    password: str,
+):
+    """Async task: Remove password from a PDF."""
+    output_dir = os.path.join("/tmp/outputs", task_id)
+    os.makedirs(output_dir, exist_ok=True)
+    output_path = os.path.join(output_dir, f"{task_id}_unlocked.pdf")
+
+    try:
+        self.update_state(state="PROCESSING", meta={"step": "Unlocking PDF..."})
+        stats = unlock_pdf(input_path, output_path, password=password)
+
+        self.update_state(state="PROCESSING", meta={"step": "Uploading result..."})
+        s3_key = storage.upload_file(output_path, task_id, folder="outputs")
+
+        name_without_ext = os.path.splitext(original_filename)[0]
+        download_name = f"{name_without_ext}_unlocked.pdf"
+        download_url = storage.generate_presigned_url(s3_key, original_filename=download_name)
+
+        result = {
+            "status": "completed",
+            "download_url": download_url,
+            "filename": download_name,
+            "total_pages": stats["total_pages"],
+            "output_size": stats["output_size"],
+        }
+
+        _cleanup(task_id)
+        logger.info(f"Task {task_id}: PDF unlocked")
+        return result
+
+    except PDFToolsError as e:
+        logger.error(f"Task {task_id}: Unlock error — {e}")
+        _cleanup(task_id)
+        return {"status": "failed", "error": str(e)}
+    except Exception as e:
+        logger.error(f"Task {task_id}: Unexpected error — {e}")
+        _cleanup(task_id)
+        return {"status": "failed", "error": "An unexpected error occurred."}
diff --git a/backend/config/__init__.py b/backend/config/__init__.py
index 1129968..dd88567 100644
--- a/backend/config/__init__.py
+++ b/backend/config/__init__.py
@@ -25,6 +25,8 @@ class BaseConfig:
         "jpg": ["image/jpeg"],
         "jpeg": ["image/jpeg"],
         "webp": ["image/webp"],
+        "tiff": ["image/tiff"],
+        "bmp": ["image/bmp"],
         "mp4": ["video/mp4"],
         "webm": ["video/webm"],
     }
@@ -38,6 +40,8 @@ class BaseConfig:
         "jpg": 10 * 1024 * 1024,       # 10MB
         "jpeg": 10 * 1024 * 1024,      # 10MB
         "webp": 10 * 1024 * 1024,      # 10MB
+        "tiff": 15 * 1024 * 1024,      # 15MB
+        "bmp": 15 * 1024 * 1024,       # 15MB
         "mp4": 50 * 1024 * 1024,       # 50MB
         "webm": 50 * 1024 * 1024,      # 50MB
     }
diff --git a/backend/requirements.txt b/backend/requirements.txt
index bf87b44..66e1284 100644
--- a/backend/requirements.txt
+++ b/backend/requirements.txt
@@ -12,10 +12,15 @@ redis>=5.0,<6.0
 flower>=2.0,<3.0
 
 # File Processing
-Pillow>=10.0,<11.0
+Pillow>=10.0,<12.0
 python-magic>=0.4.27,<1.0
 ffmpeg-python>=0.2,<1.0
 
+# PDF Processing
+PyPDF2>=3.0,<4.0
+reportlab>=4.0,<5.0
+pdf2image>=1.16,<2.0
+
 # AWS
 boto3>=1.34,<2.0
 
diff --git a/frontend/index.html b/frontend/index.html
index 650c883..c7981d4 100644
--- a/frontend/index.html
+++ b/frontend/index.html
@@ -4,7 +4,17 @@
     <meta charset="UTF-8" />
     <link rel="icon" type="image/svg+xml" href="/favicon.svg" />
     <meta name="viewport" content="width=device-width, initial-scale=1.0" />
-    <meta name="description" content="Free online tools for PDF, image, video, and text processing. Convert, compress, and transform your files instantly." />
+    <meta name="description" content="Free online tools for PDF, image, video, and text processing. Merge, split, compress, convert, watermark, protect & more — instantly." />
+    <meta name="keywords" content="PDF tools, merge PDF, split PDF, compress PDF, PDF to Word, image converter, free online tools, Arabic PDF tools" />
+    <meta name="author" content="SaaS-PDF" />
+    <meta name="robots" content="index, follow" />
+    <meta property="og:type" content="website" />
+    <meta property="og:title" content="SaaS-PDF — Free Online File Tools" />
+    <meta property="og:description" content="16+ free tools: merge, split, compress, convert PDFs, images, videos & text. No signup required." />
+    <meta property="og:site_name" content="SaaS-PDF" />
+    <meta name="twitter:card" content="summary_large_image" />
+    <meta name="twitter:title" content="SaaS-PDF — Free Online File Tools" />
+    <meta name="twitter:description" content="16+ free tools: merge, split, compress, convert PDFs, images, videos & text. No signup required." />
     <link rel="preconnect" href="https://fonts.googleapis.com" />
     <link rel="preconnect" href="https://fonts.gstatic.com" crossorigin />
     <link href="https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&family=Tajawal:wght@300;400;500;700&display=swap" rel="stylesheet" />
diff --git a/frontend/src/App.tsx b/frontend/src/App.tsx
index 47c8fab..95a41aa 100644
--- a/frontend/src/App.tsx
+++ b/frontend/src/App.tsx
@@ -19,6 +19,15 @@ const ImageConverter = lazy(() => import('@/components/tools/ImageConverter'));
 const VideoToGif = lazy(() => import('@/components/tools/VideoToGif'));
 const WordCounter = lazy(() => import('@/components/tools/WordCounter'));
 const TextCleaner = lazy(() => import('@/components/tools/TextCleaner'));
+const MergePdf = lazy(() => import('@/components/tools/MergePdf'));
+const SplitPdf = lazy(() => import('@/components/tools/SplitPdf'));
+const RotatePdf = lazy(() => import('@/components/tools/RotatePdf'));
+const PdfToImages = lazy(() => import('@/components/tools/PdfToImages'));
+const ImagesToPdf = lazy(() => import('@/components/tools/ImagesToPdf'));
+const WatermarkPdf = lazy(() => import('@/components/tools/WatermarkPdf'));
+const ProtectPdf = lazy(() => import('@/components/tools/ProtectPdf'));
+const UnlockPdf = lazy(() => import('@/components/tools/UnlockPdf'));
+const AddPageNumbers = lazy(() => import('@/components/tools/AddPageNumbers'));
 
 function LoadingFallback() {
   return (
@@ -48,6 +57,15 @@ export default function App() {
             <Route path="/tools/pdf-to-word" element={<PdfToWord />} />
             <Route path="/tools/word-to-pdf" element={<WordToPdf />} />
             <Route path="/tools/compress-pdf" element={<PdfCompressor />} />
+            <Route path="/tools/merge-pdf" element={<MergePdf />} />
+            <Route path="/tools/split-pdf" element={<SplitPdf />} />
+            <Route path="/tools/rotate-pdf" element={<RotatePdf />} />
+            <Route path="/tools/pdf-to-images" element={<PdfToImages />} />
+            <Route path="/tools/images-to-pdf" element={<ImagesToPdf />} />
+            <Route path="/tools/watermark-pdf" element={<WatermarkPdf />} />
+            <Route path="/tools/protect-pdf" element={<ProtectPdf />} />
+            <Route path="/tools/unlock-pdf" element={<UnlockPdf />} />
+            <Route path="/tools/page-numbers" element={<AddPageNumbers />} />
 
             {/* Image Tools */}
             <Route path="/tools/image-converter" element={<ImageConverter />} />
diff --git a/frontend/src/components/tools/AddPageNumbers.tsx b/frontend/src/components/tools/AddPageNumbers.tsx
new file mode 100644
index 0000000..c325378
--- /dev/null
+++ b/frontend/src/components/tools/AddPageNumbers.tsx
@@ -0,0 +1,171 @@
+import { useState } from 'react';
+import { useTranslation } from 'react-i18next';
+import { Helmet } from 'react-helmet-async';
+import { ListOrdered } from 'lucide-react';
+import FileUploader from '@/components/shared/FileUploader';
+import ProgressBar from '@/components/shared/ProgressBar';
+import DownloadButton from '@/components/shared/DownloadButton';
+import AdSlot from '@/components/layout/AdSlot';
+import { useFileUpload } from '@/hooks/useFileUpload';
+import { useTaskPolling } from '@/hooks/useTaskPolling';
+import { generateToolSchema } from '@/utils/seo';
+
+type Position = 'bottom-center' | 'bottom-right' | 'bottom-left' | 'top-center' | 'top-right' | 'top-left';
+
+export default function AddPageNumbers() {
+  const { t } = useTranslation();
+  const [phase, setPhase] = useState<'upload' | 'processing' | 'done'>('upload');
+  const [position, setPosition] = useState<Position>('bottom-center');
+  const [startNumber, setStartNumber] = useState(1);
+
+  const {
+    file,
+    uploadProgress,
+    isUploading,
+    taskId,
+    error: uploadError,
+    selectFile,
+    startUpload,
+    reset,
+  } = useFileUpload({
+    endpoint: '/pdf-tools/page-numbers',
+    maxSizeMB: 20,
+    acceptedTypes: ['pdf'],
+    extraData: { position, start_number: startNumber.toString() },
+  });
+
+  const { status, result, error: taskError } = useTaskPolling({
+    taskId,
+    onComplete: () => setPhase('done'),
+    onError: () => setPhase('done'),
+  });
+
+  const handleUpload = async () => {
+    const id = await startUpload();
+    if (id) setPhase('processing');
+  };
+
+  const handleReset = () => {
+    reset();
+    setPhase('upload');
+  };
+
+  const positions: { value: Position; label: string }[] = [
+    { value: 'bottom-center', label: t('tools.pageNumbers.bottomCenter') },
+    { value: 'bottom-right', label: t('tools.pageNumbers.bottomRight') },
+    { value: 'bottom-left', label: t('tools.pageNumbers.bottomLeft') },
+    { value: 'top-center', label: t('tools.pageNumbers.topCenter') },
+    { value: 'top-right', label: t('tools.pageNumbers.topRight') },
+    { value: 'top-left', label: t('tools.pageNumbers.topLeft') },
+  ];
+
+  const schema = generateToolSchema({
+    name: t('tools.pageNumbers.title'),
+    description: t('tools.pageNumbers.description'),
+    url: `${window.location.origin}/tools/page-numbers`,
+  });
+
+  return (
+    <>
+      <Helmet>
+        <title>{t('tools.pageNumbers.title')} — {t('common.appName')}</title>
+        <meta name="description" content={t('tools.pageNumbers.description')} />
+        <link rel="canonical" href={`${window.location.origin}/tools/page-numbers`} />
+        <script type="application/ld+json">{JSON.stringify(schema)}</script>
+      </Helmet>
+
+      <div className="mx-auto max-w-2xl">
+        <div className="mb-8 text-center">
+          <div className="mx-auto mb-4 flex h-16 w-16 items-center justify-center rounded-2xl bg-sky-100">
+            <ListOrdered className="h-8 w-8 text-sky-600" />
+          </div>
+          <h1 className="section-heading">{t('tools.pageNumbers.title')}</h1>
+          <p className="mt-2 text-slate-500">{t('tools.pageNumbers.description')}</p>
+        </div>
+
+        <AdSlot slot="top-banner" format="horizontal" className="mb-6" />
+
+        {phase === 'upload' && (
+          <div className="space-y-4">
+            <FileUploader
+              onFileSelect={selectFile}
+              file={file}
+              accept={{ 'application/pdf': ['.pdf'] }}
+              maxSizeMB={20}
+              isUploading={isUploading}
+              uploadProgress={uploadProgress}
+              error={uploadError}
+              onReset={handleReset}
+              acceptLabel="PDF (.pdf)"
+            />
+
+            {file && !isUploading && (
+              <>
+                {/* Position Selector */}
+                <div>
+                  <label className="mb-2 block text-sm font-medium text-slate-700">
+                    {t('tools.pageNumbers.position')}
+                  </label>
+                  <div className="grid grid-cols-3 gap-2">
+                    {positions.map((p) => (
+                      <button
+                        key={p.value}
+                        onClick={() => setPosition(p.value)}
+                        className={`rounded-lg p-2 text-center text-xs ring-1 transition-all ${
+                          position === p.value
+                            ? 'bg-primary-50 ring-primary-300 text-primary-700 font-semibold'
+                            : 'bg-white ring-slate-200 text-slate-600 hover:bg-slate-50'
+                        }`}
+                      >
+                        {p.label}
+                      </button>
+                    ))}
+                  </div>
+                </div>
+
+                {/* Start Number */}
+                <div>
+                  <label className="mb-1 block text-sm font-medium text-slate-700">
+                    {t('tools.pageNumbers.startNumber')}
+                  </label>
+                  <input
+                    type="number"
+                    min="1"
+                    value={startNumber}
+                    onChange={(e) => setStartNumber(Math.max(1, Number(e.target.value)))}
+                    className="input-field w-32"
+                  />
+                </div>
+
+                <button onClick={handleUpload} className="btn-primary w-full">
+                  {t('tools.pageNumbers.shortDesc')}
+                </button>
+              </>
+            )}
+          </div>
+        )}
+
+        {phase === 'processing' && !result && (
+          <ProgressBar state={status?.state || 'PENDING'} message={status?.progress} />
+        )}
+
+        {phase === 'done' && result && result.status === 'completed' && (
+          <DownloadButton result={result} onStartOver={handleReset} />
+        )}
+
+        {phase === 'done' && taskError && (
+          <div className="space-y-4">
+            <div className="rounded-xl bg-red-50 p-4 ring-1 ring-red-200">
+              <p className="text-sm text-red-700">{taskError}</p>
+            </div>
+            <button onClick={handleReset} className="btn-secondary w-full">
+              {t('common.startOver')}
+            </button>
+          </div>
+        )}
+
+        <AdSlot slot="bottom-banner" className="mt-8" />
+      </div>
+    </>
+  );
+}
diff --git a/frontend/src/components/tools/ImagesToPdf.tsx b/frontend/src/components/tools/ImagesToPdf.tsx
new file mode 100644
index 0000000..f947edc
--- /dev/null
+++ b/frontend/src/components/tools/ImagesToPdf.tsx
@@ -0,0 +1,208 @@
+import { useState } from 'react';
+import { useTranslation } from 'react-i18next';
+import { Helmet } from 'react-helmet-async';
+import { FileImage } from 'lucide-react';
+import AdSlot from '@/components/layout/AdSlot';
+import ProgressBar from '@/components/shared/ProgressBar';
+import DownloadButton from '@/components/shared/DownloadButton';
+import { useTaskPolling } from '@/hooks/useTaskPolling';
+import { generateToolSchema } from '@/utils/seo';
+
+export default function ImagesToPdf() {
+  const { t } = useTranslation();
+  const [phase, setPhase] = useState<'upload' | 'processing' | 'done'>('upload');
+  const [files, setFiles] = useState<File[]>([]);
+  const [isUploading, setIsUploading] = useState(false);
+  const [taskId, setTaskId] = useState<string | null>(null);
+  const [error, setError] = useState<string | null>(null);
+
+  const { status, result, error: taskError } = useTaskPolling({
+    taskId,
+    onComplete: () => setPhase('done'),
+    onError: () => setPhase('done'),
+  });
+
+  const acceptedTypes = ['image/png', 'image/jpeg', 'image/webp', 'image/bmp'];
+
+  const handleFilesSelect = (newFiles: FileList | File[]) => {
+    const fileArray = Array.from(newFiles).filter((f) =>
+      acceptedTypes.includes(f.type)
+    );
+    if (fileArray.length === 0) {
+      setError(t('tools.imagesToPdf.invalidFiles'));
+      return;
+    }
+    setFiles((prev) => [...prev, ...fileArray]);
+    setError(null);
+  };
+
+  const removeFile = (index: number) => {
+    setFiles((prev) => prev.filter((_, i) => i !== index));
+  };
+
+  const handleUpload = async () => {
+    if (files.length < 1) {
+      setError(t('tools.imagesToPdf.minFiles'));
+      return;
+    }
+
+    setIsUploading(true);
+    setError(null);
+
+    try {
+      const formData = new FormData();
+      files.forEach((f) => formData.append('files', f));
+
+      const response = await fetch('/api/pdf-tools/images-to-pdf', {
+        method: 'POST',
+        body: formData,
+      });
+
+      const data = await response.json();
+
+      if (!response.ok) {
+        throw new Error(data.error || 'Upload failed.');
+      }
+
+      setTaskId(data.task_id);
+      setPhase('processing');
+    } catch (err) {
+      setError(err instanceof Error ? err.message : 'Upload failed.');
+    } finally {
+      setIsUploading(false);
+    }
+  };
+
+  const handleReset = () => {
+    setFiles([]);
+    setPhase('upload');
+    setTaskId(null);
+    setError(null);
+  };
+
+  const schema = generateToolSchema({
+    name: t('tools.imagesToPdf.title'),
+    description: t('tools.imagesToPdf.description'),
+    url: `${window.location.origin}/tools/images-to-pdf`,
+  });
+
+  return (
+    <>
+      <Helmet>
+        <title>{t('tools.imagesToPdf.title')} — {t('common.appName')}</title>
+        <meta name="description" content={t('tools.imagesToPdf.description')} />
+        <link rel="canonical" href={`${window.location.origin}/tools/images-to-pdf`} />
+        <script type="application/ld+json">{JSON.stringify(schema)}</script>
+      </Helmet>
+
+      <div className="mx-auto max-w-2xl">
+        <div className="mb-8 text-center">
+          <div className="mx-auto mb-4 flex h-16 w-16 items-center justify-center rounded-2xl bg-pink-100">
+            <FileImage className="h-8 w-8 text-pink-600" />
+          </div>
+          <h1 className="section-heading">{t('tools.imagesToPdf.title')}</h1>
+          <p className="mt-2 text-slate-500">{t('tools.imagesToPdf.description')}</p>
+        </div>
+
+        <AdSlot slot="top-banner" format="horizontal" className="mb-6" />
+
+        {phase === 'upload' && (
+          <div className="space-y-4">
+            {/* Drop zone */}
+            <div
+              className="upload-zone cursor-pointer"
+              onClick={() => document.getElementById('images-file-input')?.click()}
+              onDragOver={(e) => e.preventDefault()}
+              onDrop={(e) => {
+                e.preventDefault();
+                if (e.dataTransfer.files) handleFilesSelect(e.dataTransfer.files);
+              }}
+            >
+              <input
+                id="images-file-input"
+                type="file"
+                accept=".png,.jpg,.jpeg,.webp,.bmp"
+                multiple
+                className="hidden"
+                onChange={(e) => {
+                  if (e.target.files) handleFilesSelect(e.target.files);
+                  e.target.value = '';
+                }}
+              />
+              <FileImage className="mb-4 h-12 w-12 text-slate-400" />
+              <p className="mb-2 text-base font-medium text-slate-700">
+                {t('common.dragDrop')}
+              </p>
+              <p className="text-sm text-slate-500">PNG, JPG, WebP, BMP</p>
+              <p className="mt-1 text-xs text-slate-400">
+                {t('common.maxSize', { size: 10 })}
+              </p>
+            </div>
+
+            {/* File list */}
+            {files.length > 0 && (
+              <div className="space-y-2">
+                {files.map((f, idx) => (
+                  <div
+                    key={`${f.name}-${idx}`}
+                    className="flex items-center justify-between rounded-lg bg-primary-50 p-3 ring-1 ring-primary-200"
+                  >
+                    <span className="truncate text-sm font-medium text-slate-900">
+                      {idx + 1}. {f.name}
+                    </span>
+                    <button
+                      onClick={() => removeFile(idx)}
+                      className="ml-2 text-xs text-red-500 hover:text-red-700"
+                    >
+                      ✕
+                    </button>
+                  </div>
+                ))}
+                <p className="text-sm text-slate-500">
+                  {files.length} {t('tools.imagesToPdf.imagesSelected')}
+                </p>
+              </div>
+            )}
+
+            {error && (
+              <div className="rounded-xl bg-red-50 p-3 ring-1 ring-red-200">
+                <p className="text-sm text-red-700">{error}</p>
+              </div>
+            )}
+
+            {files.length >= 1 && (
+              <button
+                onClick={handleUpload}
+                disabled={isUploading}
+                className="btn-primary w-full"
+              >
+                {isUploading ? t('common.processing') : t('tools.imagesToPdf.shortDesc')}
+              </button>
+            )}
+          </div>
+        )}
+
+        {phase === 'processing' && !result && (
+          <ProgressBar state={status?.state || 'PENDING'} message={status?.progress} />
+        )}
+
+        {phase === 'done' && result && result.status === 'completed' && (
+          <DownloadButton result={result} onStartOver={handleReset} />
+        )}
+
+        {phase === 'done' && taskError && (
+          <div className="space-y-4">
+            <div className="rounded-xl bg-red-50 p-4 ring-1 ring-red-200">
+              <p className="text-sm text-red-700">{taskError}</p>
+            </div>
+            <button onClick={handleReset} className="btn-secondary w-full">
+              {t('common.startOver')}
+            </button>
+          </div>
+        )}
+
+        <AdSlot slot="bottom-banner" className="mt-8" />
+      </div>
+    </>
+  );
+}
diff --git a/frontend/src/components/tools/MergePdf.tsx b/frontend/src/components/tools/MergePdf.tsx
new file mode 100644
index 0000000..08ce98c
--- /dev/null
+++ b/frontend/src/components/tools/MergePdf.tsx
@@ -0,0 +1,210 @@
+import { useState } from 'react';
+import { useTranslation } from 'react-i18next';
+import { Helmet } from 'react-helmet-async';
+import { Layers } from 'lucide-react';
+import FileUploader from '@/components/shared/FileUploader';
+import ProgressBar from '@/components/shared/ProgressBar';
+import DownloadButton from '@/components/shared/DownloadButton';
+import AdSlot from '@/components/layout/AdSlot';
+import { useTaskPolling } from '@/hooks/useTaskPolling';
+import { uploadFile, type TaskResponse } from '@/services/api';
+import { generateToolSchema } from '@/utils/seo';
+
+export default function MergePdf() {
+  const { t } = useTranslation();
+  const [phase, setPhase] = useState<'upload' | 'processing' | 'done'>('upload');
+  const [files, setFiles] = useState<File[]>([]);
+  const [uploadProgress, setUploadProgress] = useState(0);
+  const [isUploading, setIsUploading] = useState(false);
+  const [taskId, setTaskId] = useState<string | null>(null);
+  const [error, setError] = useState<string | null>(null);
+
+  const { status, result, error: taskError } = useTaskPolling({
+    taskId,
+    onComplete: () => setPhase('done'),
+    onError: () => setPhase('done'),
+  });
+
+  const handleFilesSelect = (newFiles: FileList | File[]) => {
+    const fileArray = Array.from(newFiles).filter(
+      (f) => f.type === 'application/pdf'
+    );
+    if (fileArray.length === 0) {
+      setError(t('tools.mergePdf.invalidFiles'));
+      return;
+    }
+    setFiles((prev) => [...prev, ...fileArray]);
+    setError(null);
+  };
+
+  const removeFile = (index: number) => {
+    setFiles((prev) => prev.filter((_, i) => i !== index));
+  };
+
+  const handleUpload = async () => {
+    if (files.length < 2) {
+      setError(t('tools.mergePdf.minFiles'));
+      return;
+    }
+
+    setIsUploading(true);
+    setError(null);
+
+    try {
+      const formData = new FormData();
+      files.forEach((f) => formData.append('files', f));
+
+      const response = await fetch('/api/pdf-tools/merge', {
+        method: 'POST',
+        body: formData,
+      });
+
+      const data = await response.json();
+
+      if (!response.ok) {
+        throw new Error(data.error || 'Upload failed.');
+      }
+
+      setTaskId(data.task_id);
+      setPhase('processing');
+    } catch (err) {
+      setError(err instanceof Error ? err.message : 'Upload failed.');
+    } finally {
+      setIsUploading(false);
+    }
+  };
+
+  const handleReset = () => {
+    setFiles([]);
+    setPhase('upload');
+    setTaskId(null);
+    setError(null);
+    setUploadProgress(0);
+  };
+
+  const schema = generateToolSchema({
+    name: t('tools.mergePdf.title'),
+    description: t('tools.mergePdf.description'),
+    url: `${window.location.origin}/tools/merge-pdf`,
+  });
+
+  return (
+    <>
+      <Helmet>
+        <title>{t('tools.mergePdf.title')} — {t('common.appName')}</title>
+        <meta name="description" content={t('tools.mergePdf.description')} />
+        <link rel="canonical" href={`${window.location.origin}/tools/merge-pdf`} />
+        <script type="application/ld+json">{JSON.stringify(schema)}</script>
+      </Helmet>
+
+      <div className="mx-auto max-w-2xl">
+        <div className="mb-8 text-center">
+          <div className="mx-auto mb-4 flex h-16 w-16 items-center justify-center rounded-2xl bg-violet-100">
+            <Layers className="h-8 w-8 text-violet-600" />
+          </div>
+          <h1 className="section-heading">{t('tools.mergePdf.title')}</h1>
+          <p className="mt-2 text-slate-500">{t('tools.mergePdf.description')}</p>
+        </div>
+
+        <AdSlot slot="top-banner" format="horizontal" className="mb-6" />
+
+        {phase === 'upload' && (
+          <div className="space-y-4">
+            {/* Drop zone for adding files */}
+            <div
+              className="upload-zone cursor-pointer"
+              onClick={() => document.getElementById('merge-file-input')?.click()}
+              onDragOver={(e) => e.preventDefault()}
+              onDrop={(e) => {
+                e.preventDefault();
+                if (e.dataTransfer.files) handleFilesSelect(e.dataTransfer.files);
+              }}
+            >
+              <input
+                id="merge-file-input"
+                type="file"
+                accept=".pdf"
+                multiple
+                className="hidden"
+                onChange={(e) => {
+                  if (e.target.files) handleFilesSelect(e.target.files);
+                  e.target.value = '';
+                }}
+              />
+              <Layers className="mb-4 h-12 w-12 text-slate-400" />
+              <p className="mb-2 text-base font-medium text-slate-700">
+                {t('common.dragDrop')}
+              </p>
+              <p className="text-sm text-slate-500">PDF (.pdf)</p>
+              <p className="mt-1 text-xs text-slate-400">
+                {t('common.maxSize', { size: 20 })}
+              </p>
+            </div>
+
+            {/* File list */}
+            {files.length > 0 && (
+              <div className="space-y-2">
+                {files.map((f, idx) => (
+                  <div
+                    key={`${f.name}-${idx}`}
+                    className="flex items-center justify-between rounded-lg bg-primary-50 p-3 ring-1 ring-primary-200"
+                  >
+                    <span className="truncate text-sm font-medium text-slate-900">
+                      {idx + 1}. {f.name}
+                    </span>
+                    <button
+                      onClick={() => removeFile(idx)}
+                      className="ml-2 text-xs text-red-500 hover:text-red-700"
+                    >
+                      ✕
+                    </button>
+                  </div>
+                ))}
+                <p className="text-sm text-slate-500">
+                  {files.length} {t('tools.mergePdf.filesSelected')}
+                </p>
+              </div>
+            )}
+
+            {error && (
+              <div className="rounded-xl bg-red-50 p-3 ring-1 ring-red-200">
+                <p className="text-sm text-red-700">{error}</p>
+              </div>
+            )}
+
+            {files.length >= 2 && (
+              <button
+                onClick={handleUpload}
+                disabled={isUploading}
+                className="btn-primary w-full"
+              >
+                {isUploading ? t('common.processing') : t('tools.mergePdf.shortDesc')}
+              </button>
+            )}
+          </div>
+        )}
+
+        {phase === 'processing' && !result && (
+          <ProgressBar state={status?.state || 'PENDING'} message={status?.progress} />
+        )}
+
+        {phase === 'done' && result && result.status === 'completed' && (
+          <DownloadButton result={result} onStartOver={handleReset} />
+        )}
+
+        {phase === 'done' && taskError && (
+          <div className="space-y-4">
+            <div className="rounded-xl bg-red-50 p-4 ring-1 ring-red-200">
+              <p className="text-sm text-red-700">{taskError}</p>
+            </div>
+            <button onClick={handleReset} className="btn-secondary w-full">
+              {t('common.startOver')}
+            </button>
+          </div>
+        )}
+
+        <AdSlot slot="bottom-banner" className="mt-8" />
+      </div>
+    </>
+  );
+}
diff --git a/frontend/src/components/tools/PdfToImages.tsx b/frontend/src/components/tools/PdfToImages.tsx
new file mode 100644
index 0000000..757b368
--- /dev/null
+++ b/frontend/src/components/tools/PdfToImages.tsx
@@ -0,0 +1,183 @@
+import { useState } from 'react';
+import { useTranslation } from 'react-i18next';
+import { Helmet } from 'react-helmet-async';
+import { ImageIcon } from 'lucide-react';
+import FileUploader from '@/components/shared/FileUploader';
+import ProgressBar from '@/components/shared/ProgressBar';
+import DownloadButton from '@/components/shared/DownloadButton';
+import AdSlot from '@/components/layout/AdSlot';
+import { useFileUpload } from '@/hooks/useFileUpload';
+import { useTaskPolling } from '@/hooks/useTaskPolling';
+import { generateToolSchema } from '@/utils/seo';
+
+type OutputFormat = 'png' | 'jpg';
+
+export default function PdfToImages() {
+  const { t } = useTranslation();
+  const [phase, setPhase] = useState<'upload' | 'processing' | 'done'>('upload');
+  const [format, setFormat] = useState<OutputFormat>('png');
+  const [dpi, setDpi] = useState(200);
+
+  const {
+    file,
+    uploadProgress,
+    isUploading,
+    taskId,
+    error: uploadError,
+    selectFile,
+    startUpload,
+    reset,
+  } = useFileUpload({
+    endpoint: '/pdf-tools/pdf-to-images',
+    maxSizeMB: 20,
+    acceptedTypes: ['pdf'],
+    extraData: { format, dpi: dpi.toString() },
+  });
+
+  const { status, result, error: taskError } = useTaskPolling({
+    taskId,
+    onComplete: () => setPhase('done'),
+    onError: () => setPhase('done'),
+  });
+
+  const handleUpload = async () => {
+    const id = await startUpload();
+    if (id) setPhase('processing');
+  };
+
+  const handleReset = () => {
+    reset();
+    setPhase('upload');
+  };
+
+  const formats: { value: OutputFormat; label: string }[] = [
+    { value: 'png', label: 'PNG' },
+    { value: 'jpg', label: 'JPG' },
+  ];
+
+  const dpiOptions = [
+    { value: 72, label: '72 DPI', desc: t('tools.pdfToImages.lowQuality') },
+    { value: 150, label: '150 DPI', desc: t('tools.pdfToImages.mediumQuality') },
+    { value: 200, label: '200 DPI', desc: t('tools.pdfToImages.highQuality') },
+    { value: 300, label: '300 DPI', desc: t('tools.pdfToImages.bestQuality') },
+  ];
+
+  const schema = generateToolSchema({
+    name: t('tools.pdfToImages.title'),
+    description: t('tools.pdfToImages.description'),
+    url: `${window.location.origin}/tools/pdf-to-images`,
+  });
+
+  return (
+    <>
+      <Helmet>
+        <title>{t('tools.pdfToImages.title')} — {t('common.appName')}</title>
+        <meta name="description" content={t('tools.pdfToImages.description')} />
+        <link rel="canonical" href={`${window.location.origin}/tools/pdf-to-images`} />
+        <script type="application/ld+json">{JSON.stringify(schema)}</script>
+      </Helmet>
+
+      <div className="mx-auto max-w-2xl">
+        <div className="mb-8 text-center">
+          <div className="mx-auto mb-4 flex h-16 w-16 items-center justify-center rounded-2xl bg-teal-100">
+            <ImageIcon className="h-8 w-8 text-teal-600" />
+          </div>
+          <h1 className="section-heading">{t('tools.pdfToImages.title')}</h1>
+          <p className="mt-2 text-slate-500">{t('tools.pdfToImages.description')}</p>
+        </div>
+
+        <AdSlot slot="top-banner" format="horizontal" className="mb-6" />
+
+        {phase === 'upload' && (
+          <div className="space-y-4">
+            <FileUploader
+              onFileSelect={selectFile}
+              file={file}
+              accept={{ 'application/pdf': ['.pdf'] }}
+              maxSizeMB={20}
+              isUploading={isUploading}
+              uploadProgress={uploadProgress}
+              error={uploadError}
+              onReset={handleReset}
+              acceptLabel="PDF (.pdf)"
+            />
+
+            {file && !isUploading && (
+              <>
+                {/* Format Selector */}
+                <div>
+                  <label className="mb-2 block text-sm font-medium text-slate-700">
+                    {t('tools.pdfToImages.outputFormat')}
+                  </label>
+                  <div className="grid grid-cols-2 gap-3">
+                    {formats.map((f) => (
+                      <button
+                        key={f.value}
+                        onClick={() => setFormat(f.value)}
+                        className={`rounded-xl p-3 text-center ring-1 transition-all ${
+                          format === f.value
+                            ? 'bg-primary-50 ring-primary-300 text-primary-700 font-semibold'
+                            : 'bg-white ring-slate-200 text-slate-600 hover:bg-slate-50'
+                        }`}
+                      >
+                        {f.label}
+                      </button>
+                    ))}
+                  </div>
+                </div>
+
+                {/* DPI Selector */}
+                <div>
+                  <label className="mb-2 block text-sm font-medium text-slate-700">
+                    {t('tools.pdfToImages.quality')}
+                  </label>
+                  <div className="grid grid-cols-2 gap-3 sm:grid-cols-4">
+                    {dpiOptions.map((opt) => (
+                      <button
+                        key={opt.value}
+                        onClick={() => setDpi(opt.value)}
+                        className={`rounded-xl p-3 text-center ring-1 transition-all ${
+                          dpi === opt.value
+                            ? 'bg-primary-50 ring-primary-300 text-primary-700'
+                            : 'bg-white ring-slate-200 text-slate-600 hover:bg-slate-50'
+                        }`}
+                      >
+                        <p className="text-sm font-medium">{opt.label}</p>
+                        <p className="text-xs text-slate-400 mt-0.5">{opt.desc}</p>
+                      </button>
+                    ))}
+                  </div>
+                </div>
+
+                <button onClick={handleUpload} className="btn-primary w-full">
+                  {t('tools.pdfToImages.shortDesc')}
+                </button>
+              </>
+            )}
+          </div>
+        )}
+
+        {phase === 'processing' && !result && (
+          <ProgressBar state={status?.state || 'PENDING'} message={status?.progress} />
+        )}
+
+        {phase === 'done' && result && result.status === 'completed' && (
+          <DownloadButton result={result} onStartOver={handleReset} />
+        )}
+
+        {phase === 'done' && taskError && (
+          <div className="space-y-4">
+            <div className="rounded-xl bg-red-50 p-4 ring-1 ring-red-200">
+              <p className="text-sm text-red-700">{taskError}</p>
+            </div>
+            <button onClick={handleReset} className="btn-secondary w-full">
+              {t('common.startOver')}
+            </button>
+          </div>
+        )}
+
+        <AdSlot slot="bottom-banner" className="mt-8" />
+      </div>
+    </>
+  );
+}
diff --git a/frontend/src/components/tools/ProtectPdf.tsx b/frontend/src/components/tools/ProtectPdf.tsx
new file mode 100644
index 0000000..a9c8a44
--- /dev/null
+++ b/frontend/src/components/tools/ProtectPdf.tsx
@@ -0,0 +1,168 @@
+import { useState } from 'react';
+import { useTranslation } from 'react-i18next';
+import { Helmet } from 'react-helmet-async';
+import { Lock } from 'lucide-react';
+import FileUploader from '@/components/shared/FileUploader';
+import ProgressBar from '@/components/shared/ProgressBar';
+import DownloadButton from '@/components/shared/DownloadButton';
+import AdSlot from '@/components/layout/AdSlot';
+import { useFileUpload } from '@/hooks/useFileUpload';
+import { useTaskPolling } from '@/hooks/useTaskPolling';
+import { generateToolSchema } from '@/utils/seo';
+
+export default function ProtectPdf() {
+  const { t } = useTranslation();
+  const [phase, setPhase] = useState<'upload' | 'processing' | 'done'>('upload');
+  const [password, setPassword] = useState('');
+  const [confirmPassword, setConfirmPassword] = useState('');
+
+  const passwordsMatch = password === confirmPassword && password.length > 0;
+
+  const {
+    file,
+    uploadProgress,
+    isUploading,
+    taskId,
+    error: uploadError,
+    selectFile,
+    startUpload,
+    reset,
+  } = useFileUpload({
+    endpoint: '/pdf-tools/protect',
+    maxSizeMB: 20,
+    acceptedTypes: ['pdf'],
+    extraData: { password },
+  });
+
+  const { status, result, error: taskError } = useTaskPolling({
+    taskId,
+    onComplete: () => setPhase('done'),
+    onError: () => setPhase('done'),
+  });
+
+  const handleUpload = async () => {
+    if (!passwordsMatch) return;
+    const id = await startUpload();
+    if (id) setPhase('processing');
+  };
+
+  const handleReset = () => {
+    reset();
+    setPassword('');
+    setConfirmPassword('');
+    setPhase('upload');
+  };
+
+  const schema = generateToolSchema({
+    name: t('tools.protectPdf.title'),
+    description: t('tools.protectPdf.description'),
+    url: `${window.location.origin}/tools/protect-pdf`,
+  });
+
+  return (
+    <>
+      <Helmet>
+        <title>{t('tools.protectPdf.title')} — {t('common.appName')}</title>
+        <meta name="description" content={t('tools.protectPdf.description')} />
+        <link rel="canonical" href={`${window.location.origin}/tools/protect-pdf`} />
+        <script type="application/ld+json">{JSON.stringify(schema)}</script>
+      </Helmet>
+
+      <div className="mx-auto max-w-2xl">
+        <div className="mb-8 text-center">
+          <div className="mx-auto mb-4 flex h-16 w-16 items-center justify-center rounded-2xl bg-red-100">
+            <Lock className="h-8 w-8 text-red-600" />
+          </div>
+          <h1 className="section-heading">{t('tools.protectPdf.title')}</h1>
+          <p className="mt-2 text-slate-500">{t('tools.protectPdf.description')}</p>
+        </div>
+
+        <AdSlot slot="top-banner" format="horizontal" className="mb-6" />
+
+        {phase === 'upload' && (
+          <div className="space-y-4">
+            <FileUploader
+              onFileSelect={selectFile}
+              file={file}
+              accept={{ 'application/pdf': ['.pdf'] }}
+              maxSizeMB={20}
+              isUploading={isUploading}
+              uploadProgress={uploadProgress}
+              error={uploadError}
+              onReset={handleReset}
+              acceptLabel="PDF (.pdf)"
+            />
+
+            {file && !isUploading && (
+              <>
+                {/* Password Input */}
+                <div>
+                  <label className="mb-1 block text-sm font-medium text-slate-700">
+                    {t('tools.protectPdf.password')}
+                  </label>
+                  <input
+                    type="password"
+                    value={password}
+                    onChange={(e) => setPassword(e.target.value)}
+                    className="input-field w-full"
+                    placeholder={t('tools.protectPdf.passwordPlaceholder')}
+                    autoComplete="new-password"
+                  />
+                </div>
+
+                {/* Confirm Password */}
+                <div>
+                  <label className="mb-1 block text-sm font-medium text-slate-700">
+                    {t('tools.protectPdf.confirmPassword')}
+                  </label>
+                  <input
+                    type="password"
+                    value={confirmPassword}
+                    onChange={(e) => setConfirmPassword(e.target.value)}
+                    className="input-field w-full"
+                    placeholder={t('tools.protectPdf.confirmPlaceholder')}
+                    autoComplete="new-password"
+                  />
+                  {confirmPassword && !passwordsMatch && (
+                    <p className="mt-1 text-xs text-red-500">
+                      {t('tools.protectPdf.mismatch')}
+                    </p>
+                  )}
+                </div>
+
+                <button
+                  onClick={handleUpload}
+                  disabled={!passwordsMatch}
+                  className="btn-primary w-full disabled:opacity-50"
+                >
+                  {t('tools.protectPdf.shortDesc')}
+                </button>
+              </>
+            )}
+          </div>
+        )}
+
+        {phase === 'processing' && !result && (
+          <ProgressBar state={status?.state || 'PENDING'} message={status?.progress} />
+        )}
+
+        {phase === 'done' && result && result.status === 'completed' && (
+          <DownloadButton result={result} onStartOver={handleReset} />
+        )}
+
+        {phase === 'done' && taskError && (
+          <div className="space-y-4">
+            <div className="rounded-xl bg-red-50 p-4 ring-1 ring-red-200">
+              <p className="text-sm text-red-700">{taskError}</p>
+            </div>
+            <button onClick={handleReset} className="btn-secondary w-full">
+              {t('common.startOver')}
+            </button>
+          </div>
+        )}
+
+        <AdSlot slot="bottom-banner" className="mt-8" />
+      </div>
+    </>
+  );
+}
diff --git a/frontend/src/components/tools/RotatePdf.tsx b/frontend/src/components/tools/RotatePdf.tsx
new file mode 100644
index 0000000..04a12bb
--- /dev/null
+++ b/frontend/src/components/tools/RotatePdf.tsx
@@ -0,0 +1,155 @@
+import { useState } from 'react';
+import { useTranslation } from 'react-i18next';
+import { Helmet } from 'react-helmet-async';
+import { RotateCw } from 'lucide-react';
+import FileUploader from '@/components/shared/FileUploader';
+import ProgressBar from '@/components/shared/ProgressBar';
+import DownloadButton from '@/components/shared/DownloadButton';
+import AdSlot from '@/components/layout/AdSlot';
+import { useFileUpload } from '@/hooks/useFileUpload';
+import { useTaskPolling } from '@/hooks/useTaskPolling';
+import { generateToolSchema } from '@/utils/seo';
+
+type Rotation = 90 | 180 | 270;
+
+export default function RotatePdf() {
+  const { t } = useTranslation();
+  const [phase, setPhase] = useState<'upload' | 'processing' | 'done'>('upload');
+  const [rotation, setRotation] = useState<Rotation>(90);
+
+  const {
+    file,
+    uploadProgress,
+    isUploading,
+    taskId,
+    error: uploadError,
+    selectFile,
+    startUpload,
+    reset,
+  } = useFileUpload({
+    endpoint: '/pdf-tools/rotate',
+    maxSizeMB: 20,
+    acceptedTypes: ['pdf'],
+    extraData: { rotation: rotation.toString(), pages: 'all' },
+  });
+
+  const { status, result, error: taskError } = useTaskPolling({
+    taskId,
+    onComplete: () => setPhase('done'),
+    onError: () => setPhase('done'),
+  });
+
+  const handleUpload = async () => {
+    const id = await startUpload();
+    if (id) setPhase('processing');
+  };
+
+  const handleReset = () => {
+    reset();
+    setPhase('upload');
+  };
+
+  const rotations: { value: Rotation; label: string }[] = [
+    { value: 90, label: '90°' },
+    { value: 180, label: '180°' },
+    { value: 270, label: '270°' },
+  ];
+
+  const schema = generateToolSchema({
+    name: t('tools.rotatePdf.title'),
+    description: t('tools.rotatePdf.description'),
+    url: `${window.location.origin}/tools/rotate-pdf`,
+  });
+
+  return (
+    <>
+      <Helmet>
+        <title>{t('tools.rotatePdf.title')} — {t('common.appName')}</title>
+        <meta name="description" content={t('tools.rotatePdf.description')} />
+        <link rel="canonical" href={`${window.location.origin}/tools/rotate-pdf`} />
+        <script type="application/ld+json">{JSON.stringify(schema)}</script>
+      </Helmet>
+
+      <div className="mx-auto max-w-2xl">
+        <div className="mb-8 text-center">
+          <div className="mx-auto mb-4 flex h-16 w-16 items-center justify-center rounded-2xl bg-cyan-100">
+            <RotateCw className="h-8 w-8 text-cyan-600" />
+          </div>
+          <h1 className="section-heading">{t('tools.rotatePdf.title')}</h1>
+          <p className="mt-2 text-slate-500">{t('tools.rotatePdf.description')}</p>
+        </div>
+
+        <AdSlot slot="top-banner" format="horizontal" className="mb-6" />
+
+        {phase === 'upload' && (
+          <div className="space-y-4">
+            <FileUploader
+              onFileSelect={selectFile}
+              file={file}
+              accept={{ 'application/pdf': ['.pdf'] }}
+              maxSizeMB={20}
+              isUploading={isUploading}
+              uploadProgress={uploadProgress}
+              error={uploadError}
+              onReset={handleReset}
+              acceptLabel="PDF (.pdf)"
+            />
+
+            {file && !isUploading && (
+              <>
+                <div>
+                  <label className="mb-2 block text-sm font-medium text-slate-700">
+                    {t('tools.rotatePdf.rotationAngle')}
+                  </label>
+                  <div className="grid grid-cols-3 gap-3">
+                    {rotations.map((r) => (
+                      <button
+                        key={r.value}
+                        onClick={() => setRotation(r.value)}
+                        className={`rounded-xl p-3 text-center ring-1 transition-all ${
+                          rotation === r.value
+                            ? 'bg-primary-50 ring-primary-300 text-primary-700 font-semibold'
+                            : 'bg-white ring-slate-200 text-slate-600 hover:bg-slate-50'
+                        }`}
+                      >
+                        <RotateCw className={`mx-auto h-5 w-5 mb-1 ${
+                          rotation === r.value ? 'text-primary-600' : 'text-slate-400'
+                        }`} />
+                        {r.label}
+                      </button>
+                    ))}
+                  </div>
+                </div>
+
+                <button onClick={handleUpload} className="btn-primary w-full">
+                  {t('tools.rotatePdf.shortDesc')}
+                </button>
+              </>
+            )}
+          </div>
+        )}
+
+        {phase === 'processing' && !result && (
+          <ProgressBar state={status?.state || 'PENDING'} message={status?.progress} />
+        )}
+
+        {phase === 'done' && result && result.status === 'completed' && (
+          <DownloadButton result={result} onStartOver={handleReset} />
+        )}
+
+        {phase === 'done' && taskError && (
+          <div className="space-y-4">
+            <div className="rounded-xl bg-red-50 p-4 ring-1 ring-red-200">
+              <p className="text-sm text-red-700">{taskError}</p>
+            </div>
+            <button onClick={handleReset} className="btn-secondary w-full">
+              {t('common.startOver')}
+            </button>
+          </div>
+        )}
+
+        <AdSlot slot="bottom-banner" className="mt-8" />
+      </div>
+    </>
+  );
+}
diff --git a/frontend/src/components/tools/SplitPdf.tsx b/frontend/src/components/tools/SplitPdf.tsx
new file mode 100644
index 0000000..b2385ec
--- /dev/null
+++ b/frontend/src/components/tools/SplitPdf.tsx
@@ -0,0 +1,174 @@
+import { useState } from 'react';
+import { useTranslation } from 'react-i18next';
+import { Helmet } from 'react-helmet-async';
+import { Scissors } from 'lucide-react';
+import FileUploader from '@/components/shared/FileUploader';
+import ProgressBar from '@/components/shared/ProgressBar';
+import DownloadButton from '@/components/shared/DownloadButton';
+import AdSlot from '@/components/layout/AdSlot';
+import { useFileUpload } from '@/hooks/useFileUpload';
+import { useTaskPolling } from '@/hooks/useTaskPolling';
+import { generateToolSchema } from '@/utils/seo';
+
+type SplitMode = 'all' | 'range';
+
+export default function SplitPdf() {
+  const { t } = useTranslation();
+  const [phase, setPhase] = useState<'upload' | 'processing' | 'done'>('upload');
+  const [mode, setMode] = useState<SplitMode>('all');
+  const [pages, setPages] = useState('');
+
+  const {
+    file,
+    uploadProgress,
+    isUploading,
+    taskId,
+    error: uploadError,
+    selectFile,
+    startUpload,
+    reset,
+  } = useFileUpload({
+    endpoint: '/pdf-tools/split',
+    maxSizeMB: 20,
+    acceptedTypes: ['pdf'],
+    extraData: { mode, ...(mode === 'range' ? { pages } : {}) },
+  });
+
+  const { status, result, error: taskError } = useTaskPolling({
+    taskId,
+    onComplete: () => setPhase('done'),
+    onError: () => setPhase('done'),
+  });
+
+  const handleUpload = async () => {
+    if (mode === 'range' && !pages.trim()) return;
+    const id = await startUpload();
+    if (id) setPhase('processing');
+  };
+
+  const handleReset = () => {
+    reset();
+    setPhase('upload');
+    setMode('all');
+    setPages('');
+  };
+
+  const schema = generateToolSchema({
+    name: t('tools.splitPdf.title'),
+    description: t('tools.splitPdf.description'),
+    url: `${window.location.origin}/tools/split-pdf`,
+  });
+
+  return (
+    <>
+      <Helmet>
+        <title>{t('tools.splitPdf.title')} — {t('common.appName')}</title>
+        <meta name="description" content={t('tools.splitPdf.description')} />
+        <link rel="canonical" href={`${window.location.origin}/tools/split-pdf`} />
+        <script type="application/ld+json">{JSON.stringify(schema)}</script>
+      </Helmet>
+
+      <div className="mx-auto max-w-2xl">
+        <div className="mb-8 text-center">
+          <div className="mx-auto mb-4 flex h-16 w-16 items-center justify-center rounded-2xl bg-amber-100">
+            <Scissors className="h-8 w-8 text-amber-600" />
+          </div>
+          <h1 className="section-heading">{t('tools.splitPdf.title')}</h1>
+          <p className="mt-2 text-slate-500">{t('tools.splitPdf.description')}</p>
+        </div>
+
+        <AdSlot slot="top-banner" format="horizontal" className="mb-6" />
+
+        {phase === 'upload' && (
+          <div className="space-y-4">
+            <FileUploader
+              onFileSelect={selectFile}
+              file={file}
+              accept={{ 'application/pdf': ['.pdf'] }}
+              maxSizeMB={20}
+              isUploading={isUploading}
+              uploadProgress={uploadProgress}
+              error={uploadError}
+              onReset={handleReset}
+              acceptLabel="PDF (.pdf)"
+            />
+
+            {file && !isUploading && (
+              <>
+                {/* Mode Selector */}
+                <div className="grid grid-cols-2 gap-3">
+                  <button
+                    onClick={() => setMode('all')}
+                    className={`rounded-xl p-3 text-center ring-1 transition-all ${
+                      mode === 'all'
+                        ? 'bg-primary-50 ring-primary-300 text-primary-700 font-semibold'
+                        : 'bg-white ring-slate-200 text-slate-600 hover:bg-slate-50'
+                    }`}
+                  >
+                    <p className="text-sm font-medium">{t('tools.splitPdf.allPages')}</p>
+                    <p className="text-xs text-slate-400 mt-0.5">{t('tools.splitPdf.allPagesDesc')}</p>
+                  </button>
+                  <button
+                    onClick={() => setMode('range')}
+                    className={`rounded-xl p-3 text-center ring-1 transition-all ${
+                      mode === 'range'
+                        ? 'bg-primary-50 ring-primary-300 text-primary-700 font-semibold'
+                        : 'bg-white ring-slate-200 text-slate-600 hover:bg-slate-50'
+                    }`}
+                  >
+                    <p className="text-sm font-medium">{t('tools.splitPdf.selectPages')}</p>
+                    <p className="text-xs text-slate-400 mt-0.5">{t('tools.splitPdf.selectPagesDesc')}</p>
+                  </button>
+                </div>
+
+                {/* Page Range Input */}
+                {mode === 'range' && (
+                  <div>
+                    <label className="mb-1 block text-sm font-medium text-slate-700">
+                      {t('tools.splitPdf.pageRange')}
+                    </label>
+                    <input
+                      type="text"
+                      value={pages}
+                      onChange={(e) => setPages(e.target.value)}
+                      placeholder="1, 3, 5-8"
+                      className="input-field"
+                    />
+                    <p className="mt-1 text-xs text-slate-400">
+                      {t('tools.splitPdf.pageRangeHint')}
+                    </p>
+                  </div>
+                )}
+
+                <button onClick={handleUpload} className="btn-primary w-full">
+                  {t('tools.splitPdf.shortDesc')}
+                </button>
+              </>
+            )}
+          </div>
+        )}
+
+        {phase === 'processing' && !result && (
+          <ProgressBar state={status?.state || 'PENDING'} message={status?.progress} />
+        )}
+
+        {phase === 'done' && result && result.status === 'completed' && (
+          <DownloadButton result={result} onStartOver={handleReset} />
+        )}
+
+        {phase === 'done' && taskError && (
+          <div className="space-y-4">
+            <div className="rounded-xl bg-red-50 p-4 ring-1 ring-red-200">
+              <p className="text-sm text-red-700">{taskError}</p>
+            </div>
+            <button onClick={handleReset} className="btn-secondary w-full">
+              {t('common.startOver')}
+            </button>
+          </div>
+        )}
+
+        <AdSlot slot="bottom-banner" className="mt-8" />
+      </div>
+    </>
+  );
+}
diff --git a/frontend/src/components/tools/UnlockPdf.tsx b/frontend/src/components/tools/UnlockPdf.tsx
new file mode 100644
index 0000000..3afd6cf
--- /dev/null
+++ b/frontend/src/components/tools/UnlockPdf.tsx
@@ -0,0 +1,144 @@
+import { useState } from 'react';
+import { useTranslation } from 'react-i18next';
+import { Helmet } from 'react-helmet-async';
+import { Unlock } from 'lucide-react';
+import FileUploader from '@/components/shared/FileUploader';
+import ProgressBar from '@/components/shared/ProgressBar';
+import DownloadButton from '@/components/shared/DownloadButton';
+import AdSlot from '@/components/layout/AdSlot';
+import { useFileUpload } from '@/hooks/useFileUpload';
+import { useTaskPolling } from '@/hooks/useTaskPolling';
+import { generateToolSchema } from '@/utils/seo';
+
+export default function UnlockPdf() {
+  const { t } = useTranslation();
+  const [phase, setPhase] = useState<'upload' | 'processing' | 'done'>('upload');
+  const [password, setPassword] = useState('');
+
+  const {
+    file,
+    uploadProgress,
+    isUploading,
+    taskId,
+    error: uploadError,
+    selectFile,
+    startUpload,
+    reset,
+  } = useFileUpload({
+    endpoint: '/pdf-tools/unlock',
+    maxSizeMB: 20,
+    acceptedTypes: ['pdf'],
+    extraData: { password },
+  });
+
+  const { status, result, error: taskError } = useTaskPolling({
+    taskId,
+    onComplete: () => setPhase('done'),
+    onError: () => setPhase('done'),
+  });
+
+  const handleUpload = async () => {
+    if (!password) return;
+    const id = await startUpload();
+    if (id) setPhase('processing');
+  };
+
+  const handleReset = () => {
+    reset();
+    setPassword('');
+    setPhase('upload');
+  };
+
+  const schema = generateToolSchema({
+    name: t('tools.unlockPdf.title'),
+    description: t('tools.unlockPdf.description'),
+    url: `${window.location.origin}/tools/unlock-pdf`,
+  });
+
+  return (
+    <>
+      <Helmet>
+        <title>{t('tools.unlockPdf.title')} — {t('common.appName')}</title>
+        <meta name="description" content={t('tools.unlockPdf.description')} />
+        <link rel="canonical" href={`${window.location.origin}/tools/unlock-pdf`} />
+        <script type="application/ld+json">{JSON.stringify(schema)}</script>
+      </Helmet>
+
+      <div className="mx-auto max-w-2xl">
+        <div className="mb-8 text-center">
+          <div className="mx-auto mb-4 flex h-16 w-16 items-center justify-center rounded-2xl bg-green-100">
+            <Unlock className="h-8 w-8 text-green-600" />
+          </div>
+          <h1 className="section-heading">{t('tools.unlockPdf.title')}</h1>
+          <p className="mt-2 text-slate-500">{t('tools.unlockPdf.description')}</p>
+        </div>
+
+        <AdSlot slot="top-banner" format="horizontal" className="mb-6" />
+
+        {phase === 'upload' && (
+          <div className="space-y-4">
+            <FileUploader
+              onFileSelect={selectFile}
+              file={file}
+              accept={{ 'application/pdf': ['.pdf'] }}
+              maxSizeMB={20}
+              isUploading={isUploading}
+              uploadProgress={uploadProgress}
+              error={uploadError}
+              onReset={handleReset}
+              acceptLabel="PDF (.pdf)"
+            />
+
+            {file && !isUploading && (
+              <>
+                {/* Password Input */}
+                <div>
+                  <label className="mb-1 block text-sm font-medium text-slate-700">
+                    {t('tools.unlockPdf.password')}
+                  </label>
+                  <input
+                    type="password"
+                    value={password}
+                    onChange={(e) => setPassword(e.target.value)}
+                    className="input-field w-full"
+                    placeholder={t('tools.unlockPdf.passwordPlaceholder')}
+                    autoComplete="current-password"
+                  />
+                </div>
+
+                <button
+                  onClick={handleUpload}
+                  disabled={!password}
+                  className="btn-primary w-full disabled:opacity-50"
+                >
+                  {t('tools.unlockPdf.shortDesc')}
+                </button>
+              </>
+            )}
+          </div>
+        )}
+
+        {phase === 'processing' && !result && (
+          <ProgressBar state={status?.state || 'PENDING'} message={status?.progress} />
+        )}
+
+        {phase === 'done' && result && result.status === 'completed' && (
+          <DownloadButton result={result} onStartOver={handleReset} />
+        )}
+
+        {phase === 'done' && taskError && (
+          <div className="space-y-4">
+            <div className="rounded-xl bg-red-50 p-4 ring-1 ring-red-200">
+              <p className="text-sm text-red-700">{taskError}</p>
+            </div>
+            <button onClick={handleReset} className="btn-secondary w-full">
+              {t('common.startOver')}
+            </button>
+          </div>
+        )}
+
+        <AdSlot slot="bottom-banner" className="mt-8" />
+      </div>
+    </>
+  );
+}
diff --git a/frontend/src/components/tools/WatermarkPdf.tsx b/frontend/src/components/tools/WatermarkPdf.tsx
new file mode 100644
index 0000000..d9536b2
--- /dev/null
+++ b/frontend/src/components/tools/WatermarkPdf.tsx
@@ -0,0 +1,162 @@
+import { useState } from 'react';
+import { useTranslation } from 'react-i18next';
+import { Helmet } from 'react-helmet-async';
+import { Droplets } from 'lucide-react';
+import FileUploader from '@/components/shared/FileUploader';
+import ProgressBar from '@/components/shared/ProgressBar';
+import DownloadButton from '@/components/shared/DownloadButton';
+import AdSlot from '@/components/layout/AdSlot';
+import { useFileUpload } from '@/hooks/useFileUpload';
+import { useTaskPolling } from '@/hooks/useTaskPolling';
+import { generateToolSchema } from '@/utils/seo';
+
+export default function WatermarkPdf() {
+  const { t } = useTranslation();
+  const [phase, setPhase] = useState<'upload' | 'processing' | 'done'>('upload');
+  const [text, setText] = useState('CONFIDENTIAL');
+  const [opacity, setOpacity] = useState(30);
+
+  const {
+    file,
+    uploadProgress,
+    isUploading,
+    taskId,
+    error: uploadError,
+    selectFile,
+    startUpload,
+    reset,
+  } = useFileUpload({
+    endpoint: '/pdf-tools/watermark',
+    maxSizeMB: 20,
+    acceptedTypes: ['pdf'],
+    extraData: { text, opacity: (opacity / 100).toString() },
+  });
+
+  const { status, result, error: taskError } = useTaskPolling({
+    taskId,
+    onComplete: () => setPhase('done'),
+    onError: () => setPhase('done'),
+  });
+
+  const handleUpload = async () => {
+    const id = await startUpload();
+    if (id) setPhase('processing');
+  };
+
+  const handleReset = () => {
+    reset();
+    setPhase('upload');
+  };
+
+  const schema = generateToolSchema({
+    name: t('tools.watermarkPdf.title'),
+    description: t('tools.watermarkPdf.description'),
+    url: `${window.location.origin}/tools/watermark-pdf`,
+  });
+
+  return (
+    <>
+      <Helmet>
+        <title>{t('tools.watermarkPdf.title')} — {t('common.appName')}</title>
+        <meta name="description" content={t('tools.watermarkPdf.description')} />
+        <link rel="canonical" href={`${window.location.origin}/tools/watermark-pdf`} />
+        <script type="application/ld+json">{JSON.stringify(schema)}</script>
+      </Helmet>
+
+      <div className="mx-auto max-w-2xl">
+        <div className="mb-8 text-center">
+          <div className="mx-auto mb-4 flex h-16 w-16 items-center justify-center rounded-2xl bg-cyan-100">
+            <Droplets className="h-8 w-8 text-cyan-600" />
+          </div>
+          <h1 className="section-heading">{t('tools.watermarkPdf.title')}</h1>
+          <p className="mt-2 text-slate-500">{t('tools.watermarkPdf.description')}</p>
+        </div>
+
+        <AdSlot slot="top-banner" format="horizontal" className="mb-6" />
+
+        {phase === 'upload' && (
+          <div className="space-y-4">
+            <FileUploader
+              onFileSelect={selectFile}
+              file={file}
+              accept={{ 'application/pdf': ['.pdf'] }}
+              maxSizeMB={20}
+              isUploading={isUploading}
+              uploadProgress={uploadProgress}
+              error={uploadError}
+              onReset={handleReset}
+              acceptLabel="PDF (.pdf)"
+            />
+
+            {file && !isUploading && (
+              <>
+                {/* Watermark Text */}
+                <div>
+                  <label className="mb-1 block text-sm font-medium text-slate-700">
+                    {t('tools.watermarkPdf.text')}
+                  </label>
+                  <input
+                    type="text"
+                    value={text}
+                    onChange={(e) => setText(e.target.value)}
+                    maxLength={50}
+                    className="input-field w-full"
+                    placeholder={t('tools.watermarkPdf.textPlaceholder')}
+                  />
+                </div>
+
+                {/* Opacity Slider */}
+                <div>
+                  <label className="mb-1 block text-sm font-medium text-slate-700">
+                    {t('tools.watermarkPdf.opacity')}: {opacity}%
+                  </label>
+                  <input
+                    type="range"
+                    min="5"
+                    max="100"
+                    value={opacity}
+                    onChange={(e) => setOpacity(Number(e.target.value))}
+                    className="w-full accent-cyan-600"
+                  />
+                  <div className="flex justify-between text-xs text-slate-400">
+                    <span>{t('tools.watermarkPdf.light')}</span>
+                    <span>{t('tools.watermarkPdf.heavy')}</span>
+                  </div>
+                </div>
+
+                <button
+                  onClick={handleUpload}
+                  disabled={!text.trim()}
+                  className="btn-primary w-full disabled:opacity-50"
+                >
+                  {t('tools.watermarkPdf.shortDesc')}
+                </button>
+              </>
+            )}
+          </div>
+        )}
+
+        {phase === 'processing' && !result && (
+          <ProgressBar state={status?.state || 'PENDING'} message={status?.progress} />
+        )}
+
+        {phase === 'done' && result && result.status === 'completed' && (
+          <DownloadButton result={result} onStartOver={handleReset} />
+        )}
+
+        {phase === 'done' && taskError && (
+          <div className="space-y-4">
+            <div className="rounded-xl bg-red-50 p-4 ring-1 ring-red-200">
+              <p className="text-sm text-red-700">{taskError}</p>
+            </div>
+            <button onClick={handleReset} className="btn-secondary w-full">
+              {t('common.startOver')}
+            </button>
+          </div>
+        )}
+
+        <AdSlot slot="bottom-banner" className="mt-8" />
+      </div>
+    </>
+  );
+}
diff --git a/frontend/src/i18n/ar.json b/frontend/src/i18n/ar.json
index 69eb02a..e195b6f 100644
--- a/frontend/src/i18n/ar.json
+++ b/frontend/src/i18n/ar.json
@@ -82,6 +82,92 @@
       "toSentenceCase": "حالة الجملة",
       "removeDiacritics": "إزالة التشكيل العربي",
       "copyResult": "نسخ النتيجة"
+    },
+    "mergePdf": {
+      "title": "دمج PDF",
+      "description": "ادمج عدة ملفات PDF في مستند واحد. مجاني وسريع.",
+      "shortDesc": "دمج PDF",
+      "selectFiles": "اختر ملفات PDF",
+      "addMore": "أضف ملفات أخرى",
+      "filesSelected": "{{count}} ملفات مختارة",
+      "dragToReorder": "اسحب الملفات لإعادة ترتيبها"
+    },
+    "splitPdf": {
+      "title": "تقسيم PDF",
+      "description": "قسّم ملف PDF إلى صفحات فردية أو استخرج نطاقات صفحات محددة.",
+      "shortDesc": "تقسيم PDF",
+      "allPages": "كل الصفحات",
+      "pageRange": "نطاق الصفحات",
+      "rangeHint": "مثال: 1,3,5-8",
+      "rangePlaceholder": "أدخل الصفحات: 1,3,5-8"
+    },
+    "rotatePdf": {
+      "title": "تدوير PDF",
+      "description": "دوّر جميع صفحات ملف PDF بزاوية 90° أو 180° أو 270° درجة.",
+      "shortDesc": "تدوير PDF",
+      "angle": "زاوية التدوير",
+      "90": "90° مع عقارب الساعة",
+      "180": "180° قلب",
+      "270": "270° عكس عقارب الساعة"
+    },
+    "pdfToImages": {
+      "title": "PDF إلى صور",
+      "description": "حوّل كل صفحة من ملف PDF إلى صور عالية الجودة (PNG أو JPG).",
+      "shortDesc": "PDF → صور",
+      "format": "صيغة الصورة",
+      "dpi": "الدقة (DPI)",
+      "dpiLow": "72 — شاشة",
+      "dpiMedium": "150 — قياسي",
+      "dpiHigh": "200 — جيد",
+      "dpiUltra": "300 — جودة طباعة"
+    },
+    "imagesToPdf": {
+      "title": "صور إلى PDF",
+      "description": "ادمج عدة صور في مستند PDF واحد.",
+      "shortDesc": "صور → PDF",
+      "selectImages": "اختر الصور",
+      "addMore": "أضف صور أخرى",
+      "imagesSelected": "{{count}} صور مختارة"
+    },
+    "watermarkPdf": {
+      "title": "علامة مائية PDF",
+      "description": "أضف علامة مائية نصية مخصصة لكل صفحة من ملف PDF.",
+      "shortDesc": "إضافة علامة مائية",
+      "text": "نص العلامة المائية",
+      "textPlaceholder": "أدخل نص العلامة المائية",
+      "opacity": "الشفافية",
+      "light": "خفيف",
+      "heavy": "كثيف"
+    },
+    "protectPdf": {
+      "title": "حماية PDF",
+      "description": "أضف حماية بكلمة مرور لملف PDF لمنع الوصول غير المصرّح به.",
+      "shortDesc": "حماية PDF",
+      "password": "كلمة المرور",
+      "passwordPlaceholder": "أدخل كلمة مرور قوية",
+      "confirmPassword": "تأكيد كلمة المرور",
+      "confirmPlaceholder": "أعد إدخال كلمة المرور",
+      "mismatch": "كلمات المرور غير متطابقة"
+    },
+    "unlockPdf": {
+      "title": "فك حماية PDF",
+      "description": "أزل حماية كلمة المرور من ملف PDF.",
+      "shortDesc": "فك حماية PDF",
+      "password": "كلمة المرور الحالية",
+      "passwordPlaceholder": "أدخل كلمة مرور الملف"
+    },
+    "pageNumbers": {
+      "title": "إضافة أرقام الصفحات",
+      "description": "أضف أرقام الصفحات لكل صفحة في ملف PDF. اختر الموضع ورقم البداية.",
+      "shortDesc": "أرقام الصفحات",
+      "position": "موضع الرقم",
+      "startNumber": "ابدأ من",
+      "bottomCenter": "أسفل الوسط",
+      "bottomRight": "أسفل اليمين",
+      "bottomLeft": "أسفل اليسار",
+      "topCenter": "أعلى الوسط",
+      "topRight": "أعلى اليمين",
+      "topLeft": "أعلى اليسار"
     }
   },
   "result": {
diff --git a/frontend/src/i18n/en.json b/frontend/src/i18n/en.json
index 764fa63..bc99cbf 100644
--- a/frontend/src/i18n/en.json
+++ b/frontend/src/i18n/en.json
@@ -82,6 +82,92 @@
       "toSentenceCase": "Sentence case",
       "removeDiacritics": "Remove Arabic Diacritics",
       "copyResult": "Copy Result"
+    },
+    "mergePdf": {
+      "title": "Merge PDF",
+      "description": "Combine multiple PDF files into a single document. Free and fast.",
+      "shortDesc": "Merge PDFs",
+      "selectFiles": "Select PDF Files",
+      "addMore": "Add More Files",
+      "filesSelected": "{{count}} files selected",
+      "dragToReorder": "Drag files to reorder them"
+    },
+    "splitPdf": {
+      "title": "Split PDF",
+      "description": "Split a PDF into individual pages or extract specific page ranges.",
+      "shortDesc": "Split PDF",
+      "allPages": "All Pages",
+      "pageRange": "Page Range",
+      "rangeHint": "e.g. 1,3,5-8",
+      "rangePlaceholder": "Enter pages: 1,3,5-8"
+    },
+    "rotatePdf": {
+      "title": "Rotate PDF",
+      "description": "Rotate all pages of a PDF by 90°, 180°, or 270° degrees.",
+      "shortDesc": "Rotate PDF",
+      "angle": "Rotation Angle",
+      "90": "90° Clockwise",
+      "180": "180° Flip",
+      "270": "270° Counter-clockwise"
+    },
+    "pdfToImages": {
+      "title": "PDF to Images",
+      "description": "Convert each page of a PDF into high-quality images (PNG or JPG).",
+      "shortDesc": "PDF → Images",
+      "format": "Image Format",
+      "dpi": "Resolution (DPI)",
+      "dpiLow": "72 — Screen",
+      "dpiMedium": "150 — Standard",
+      "dpiHigh": "200 — Good",
+      "dpiUltra": "300 — Print Quality"
+    },
+    "imagesToPdf": {
+      "title": "Images to PDF",
+      "description": "Combine multiple images into a single PDF document.",
+      "shortDesc": "Images → PDF",
+      "selectImages": "Select Images",
+      "addMore": "Add More Images",
+      "imagesSelected": "{{count}} images selected"
+    },
+    "watermarkPdf": {
+      "title": "Watermark PDF",
+      "description": "Add a custom text watermark to every page of your PDF.",
+      "shortDesc": "Add Watermark",
+      "text": "Watermark Text",
+      "textPlaceholder": "Enter watermark text",
+      "opacity": "Opacity",
+      "light": "Light",
+      "heavy": "Heavy"
+    },
+    "protectPdf": {
+      "title": "Protect PDF",
+      "description": "Add password protection to your PDF to prevent unauthorized access.",
+      "shortDesc": "Protect PDF",
+      "password": "Password",
+      "passwordPlaceholder": "Enter a strong password",
+      "confirmPassword": "Confirm Password",
+      "confirmPlaceholder": "Re-enter the password",
+      "mismatch": "Passwords do not match"
+    },
+    "unlockPdf": {
+      "title": "Unlock PDF",
+      "description": "Remove password protection from your PDF file.",
+      "shortDesc": "Unlock PDF",
+      "password": "Current Password",
+      "passwordPlaceholder": "Enter the PDF password"
+    },
+    "pageNumbers": {
+      "title": "Add Page Numbers",
+      "description": "Add page numbers to every page of your PDF. Choose position and starting number.",
+      "shortDesc": "Add Page Numbers",
+      "position": "Number Position",
+      "startNumber": "Start From",
+      "bottomCenter": "Bottom Center",
+      "bottomRight": "Bottom Right",
+      "bottomLeft": "Bottom Left",
+      "topCenter": "Top Center",
+      "topRight": "Top Right",
+      "topLeft": "Top Left"
     }
   },
   "result": {
diff --git a/frontend/src/pages/HomePage.tsx b/frontend/src/pages/HomePage.tsx
index a210d10..120ab20 100644
--- a/frontend/src/pages/HomePage.tsx
+++ b/frontend/src/pages/HomePage.tsx
@@ -8,6 +8,15 @@ import {
   Film,
   Hash,
   Eraser,
+  Layers,
+  Scissors,
+  RotateCw,
+  Image,
+  FileImage,
+  Droplets,
+  Lock,
+  Unlock,
+  ListOrdered,
 } from 'lucide-react';
 import ToolCard from '@/components/shared/ToolCard';
 import AdSlot from '@/components/layout/AdSlot';
@@ -23,6 +32,15 @@ const tools: ToolInfo[] = [
   { key: 'pdfToWord', path: '/tools/pdf-to-word', icon: <FileText className="h-6 w-6 text-red-600" />, bgColor: 'bg-red-50' },
   { key: 'wordToPdf', path: '/tools/word-to-pdf', icon: <FileOutput className="h-6 w-6 text-blue-600" />, bgColor: 'bg-blue-50' },
   { key: 'compressPdf', path: '/tools/compress-pdf', icon: <Minimize2 className="h-6 w-6 text-orange-600" />, bgColor: 'bg-orange-50' },
+  { key: 'mergePdf', path: '/tools/merge-pdf', icon: <Layers className="h-6 w-6 text-violet-600" />, bgColor: 'bg-violet-50' },
+  { key: 'splitPdf', path: '/tools/split-pdf', icon: <Scissors className="h-6 w-6 text-pink-600" />, bgColor: 'bg-pink-50' },
+  { key: 'rotatePdf', path: '/tools/rotate-pdf', icon: <RotateCw className="h-6 w-6 text-teal-600" />, bgColor: 'bg-teal-50' },
+  { key: 'pdfToImages', path: '/tools/pdf-to-images', icon: <Image className="h-6 w-6 text-amber-600" />, bgColor: 'bg-amber-50' },
+  { key: 'imagesToPdf', path: '/tools/images-to-pdf', icon: <FileImage className="h-6 w-6 text-lime-600" />, bgColor: 'bg-lime-50' },
+  { key: 'watermarkPdf', path: '/tools/watermark-pdf', icon: <Droplets className="h-6 w-6 text-cyan-600" />, bgColor: 'bg-cyan-50' },
+  { key: 'protectPdf', path: '/tools/protect-pdf', icon: <Lock className="h-6 w-6 text-red-600" />, bgColor: 'bg-red-50' },
+  { key: 'unlockPdf', path: '/tools/unlock-pdf', icon: <Unlock className="h-6 w-6 text-green-600" />, bgColor: 'bg-green-50' },
+  { key: 'pageNumbers', path: '/tools/page-numbers', icon: <ListOrdered className="h-6 w-6 text-sky-600" />, bgColor: 'bg-sky-50' },
   { key: 'imageConvert', path: '/tools/image-converter', icon: <ImageIcon className="h-6 w-6 text-purple-600" />, bgColor: 'bg-purple-50' },
   { key: 'videoToGif', path: '/tools/video-to-gif', icon: <Film className="h-6 w-6 text-emerald-600" />, bgColor: 'bg-emerald-50' },
   { key: 'wordCounter', path: '/tools/word-counter', icon: <Hash className="h-6 w-6 text-blue-600" />, bgColor: 'bg-blue-50' },
diff --git a/nginx/nginx.conf b/nginx/nginx.conf
index 683e1e2..06d35fd 100644
--- a/nginx/nginx.conf
+++ b/nginx/nginx.conf
@@ -16,6 +16,8 @@ server {
     add_header X-Content-Type-Options "nosniff" always;
     add_header X-XSS-Protection "1; mode=block" always;
     add_header Referrer-Policy "strict-origin-when-cross-origin" always;
+    add_header Permissions-Policy "camera=(), microphone=(), geolocation=()" always;
+    add_header Content-Security-Policy "default-src 'self'; script-src 'self' 'unsafe-inline' https://pagead2.googlesyndication.com; style-src 'self' 'unsafe-inline' https://fonts.googleapis.com; font-src 'self' https://fonts.gstatic.com; img-src 'self' data: blob:; connect-src 'self'; frame-ancestors 'self'" always;
 
     # API requests → Flask backend
     location /api/ {
diff --git a/nginx/nginx.prod.conf b/nginx/nginx.prod.conf
index 733dd9c..a739c7b 100644
--- a/nginx/nginx.prod.conf
+++ b/nginx/nginx.prod.conf
@@ -29,6 +29,8 @@ server {
     add_header X-Content-Type-Options "nosniff" always;
     add_header X-XSS-Protection "1; mode=block" always;
     add_header Referrer-Policy "strict-origin-when-cross-origin" always;
+    add_header Permissions-Policy "camera=(), microphone=(), geolocation=()" always;
+    add_header Content-Security-Policy "default-src 'self'; script-src 'self' 'unsafe-inline' https://pagead2.googlesyndication.com; style-src 'self' 'unsafe-inline' https://fonts.googleapis.com; font-src 'self' https://fonts.gstatic.com; img-src 'self' data: blob:; connect-src 'self'; frame-ancestors 'self'" always;
 
     # Gzip
     gzip on;
diff --git a/scripts/generate_sitemap.py b/scripts/generate_sitemap.py
index c86007e..29acb9b 100644
--- a/scripts/generate_sitemap.py
+++ b/scripts/generate_sitemap.py
@@ -15,6 +15,15 @@ TOOLS = [
     '/tools/pdf-to-word',
     '/tools/word-to-pdf',
     '/tools/compress-pdf',
+    '/tools/merge-pdf',
+    '/tools/split-pdf',
+    '/tools/rotate-pdf',
+    '/tools/pdf-to-images',
+    '/tools/images-to-pdf',
+    '/tools/watermark-pdf',
+    '/tools/protect-pdf',
+    '/tools/unlock-pdf',
+    '/tools/page-numbers',
     '/tools/image-converter',
     '/tools/video-to-gif',
     '/tools/word-counter',