A 100% client-side PDF compression and merging tool. Your files never leave your browser - complete privacy guaranteed.
🔗 Live Demo: https://ibrahim-dogan.github.io/pdf-merge-compress/
- 5 preset levels: Minimal, Low, Medium, High, Maximum
- Custom settings: Fine-tune DPI (72-300) and JPEG quality (30-100%)
- Real-time compression with progress indicator
- Shows before/after size comparison
- Combine multiple PDFs into one
- Drag-to-reorder files before merging
- No quality loss - original content preserved
- Add/remove files easily
- 100% client-side - files never uploaded to any server
- Works offline after initial load
- No tracking, no ads, no data collection
- Uses browser's local processing power
- PDF.js - Mozilla's PDF rendering library
- jsPDF - PDF generation from compressed images
- pdf-lib - PDF manipulation for merging (lossless)
- Vanilla JS/CSS - No frameworks, fast loading
Visit the live demo
# Clone the repository
git clone https://github.com/ibrahim-dogan/pdf-merge-compress.git
cd pdf-merge-compress
# Start a local server
python3 -m http.server 8080
# Open in browser
open http://localhost:8080pdf-merge-compress/
├── index.html # Compress page
├── merge.html # Merge page
├── app.js # Compression logic (PDF.js + jsPDF)
├── merge.js # Merge logic (pdf-lib)
├── styles.css # Main styles
└── merge.css # Merge-specific styles
| Preset | DPI | Quality | Best For |
|---|---|---|---|
| 💎 Minimal | 200 | 90% | Important documents |
| 🎯 Low | 150 | 85% | General use |
| ⚖️ Medium | 120 | 75% | Email attachments |
| 🚀 High | 96 | 60% | Web uploads |
| 🔥 Maximum | 72 | 50% | Maximum compression |
- Compression converts pages to images - text will no longer be selectable
- Best for scanned documents and image-heavy PDFs
- For text-heavy PDFs, use "Minimal" preset
- Merge preserves original quality - no conversion applied
MIT License - feel free to use and modify.
Contributions are welcome! Feel free to open issues or submit pull requests.
Made with ❤️ for privacy-conscious users