📄 Offline PDF Tools – Private PDF Editor

Tagline: Merge, split, compress, watermark, protect, and edit PDFs — 100% offline, private, and fast.

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✨ Overview

Offline PDF Tools is a modern, privacy-first Chrome Extension (Manifest V3) that opens as a full-page app and lets you modify PDFs entirely within your browser.

All PDF operations are performed locally in memory — 📌 no uploads, no servers, no tracking.

Built for users who need reliable PDF tools without trusting online services, this extension focuses on privacy, performance, and simplicity.

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🚀 Key Features

📑 Merge PDFs

• Combine multiple PDF files into a single document
• Drag-and-drop file upload
• Reorder input files before merging
• Automatic filename generation

✂️ Split PDF (Page Ranges)

• Split PDFs using flexible range syntax:

  1-3,5,7-10
  

• Validate ranges against total page count
• Export only the pages you need

📋 Extract Pages

• Select individual pages using thumbnail grid
• Create a new PDF from selected pages
• Visual selection indicators and page numbers

🔀 Reorder Pages

• Drag-and-drop page thumbnails
• Reorder pages intuitively
• Export reordered PDF instantly

🗑️ Delete Pages

• Remove unwanted pages from a document
• Prevents deleting all pages (safe guard)
• Works seamlessly with preview grid

🔄 Rotate Pages

• Rotate pages by 90°, 180°, or 270°
• Per-page rotation controls
• Visual rotation preview before export

🔓 Unlock PDF

• Remove password security from encrypted PDFs locally
• Instant password entry decryption

🔒 Protect PDF

• Set custom user and owner passwords completely offline
• Restrict printing, content copying, editing, or form-filling permissions

🛠️ Repair PDF

• Reconstruct cross-reference tables (xref) and trailers of broken PDFs
• Local stream byte offset recovery

✍️ Edit Metadata

• Modify document metadata (Title, Author, Subject, Keywords) offline
• Auto-populates existing metadata fields for quick edits

📉 Compress PDF

• Deflate stream size losslessly to optimize PDF files locally

💧 Watermarks & Page Numbers

• Draw custom text watermarks (color, size, opacity, rotation angle)
• Stamp dynamic page numbers at 6 standard alignments
• Supports simultaneous dual overlays

↩️ Global Undo/Redo

• Step backward or forward through page selections, rotations, and reorder steps
• Bound to Ctrl/Cmd + Z and Ctrl/Cmd + Y shortcuts

📋 Action Presets (Blueprints)

• Save actions (rotations and deletions) as custom local blueprints to apply to new uploads

📊 Privacy Scoreboard

• Track cumulative stats (total processed files, bandwidth saved in MB) in the footer scoreboard

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🖥️ UI Philosophy

Offline PDF Tools is designed with:

• Privacy-first UX
• Full-page workspace (not a popup)
• Clear visual feedback
• Minimal distractions
• Fast, responsive interactions
• Keyboard-friendly navigation
• No forced login or account setup

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📸 Screenshots

🔷 Light Mode

🌑 Dark Mode

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🛠 Built With

• HTML5, CSS3, Vanilla JavaScript
• pdf-lib – PDF manipulation engine
• PDF.js – Page thumbnails & previews
• Chrome Extensions API (Manifest V3)
• Modular, service-based architecture
• CSP-compliant & review-safe design

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📦 Installation

🌐 Install from Chrome Web Store (Recommended)

📥 Get it on Chrome Web Store

1. Click the link above or visit the Chrome Web Store
2. Click "Add to Chrome"
3. Confirm the installation

🔧 Load Offline PDF Tools Manually (Developer Mode)

1. Clone or Download this Repository

   git clone https://github.com/Kartikpatkar/offline-pdf-tools.git

2. Open Chrome Extensions Page

   chrome://extensions/
   

3. Enable Developer Mode

   • Toggle Developer mode (top-right)

4. Click “Load unpacked”

   • Select the project root folder (contains manifest.json)

5. Done 🎉

   • Launch the extension from Chrome’s extensions menu

✅ Works completely offline ✅ No internet connection required ✅ No external services or uploads

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🧪 Current Capabilities

✔ Merge PDFs ✔ Split PDFs using page ranges ✔ Extract selected pages ✔ Reorder pages visually ✔ Delete unwanted pages ✔ Rotate pages ✔ Unlock password-protected PDFs ✔ Encrypt and restrict PDF permissions ✔ Repair corrupted/damaged PDF structures ✔ Edit PDF metadata tags ✔ Compress file sizes losslessly ✔ Apply text watermarks and page numbers simultaneously ✔ Undo/Redo stack with keyboard shortcuts ✔ Action preset blueprints ✔ Local privacy scoreboard ✔ Light / dark theme ✔ Full offline processing

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🛣️ Roadmap (Planned Enhancements)

• 📁 Multi-file batch processing for conversion tools
• 🖊️ Interactive PDF signing and form editing
• 🔍 Offline Optical Character Recognition (OCR) text extraction
• 🌐 Internationalization support (i18n) for more languages
• ⚙️ Global extension configuration settings panel

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🤝 Contributing

Contributions, bug reports, and feature suggestions are welcome!

• Fork the repository
• Create a feature branch
• Submit a pull request

Please keep changes modular, offline-safe, and aligned with privacy-first principles.

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🧠 Author

Built by Kartik Patkar 🔗 GitHub • LinkedIn • Developer & Salesforce Consultant

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📜 License

This project is licensed under the MIT License — free to use, modify, and distribute.

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Offline PDF Tools — powerful PDF editing without compromising your privacy.

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