PDF Ninja
Professional PDF tools for free. Fast, secure, and easy to use.
Merge PDF
Combine multiple PDF files into one document
Split PDF
Split PDF into multiple documents
Compress PDF
Reduce PDF file size while maintaining quality
Browser-Based Processing
All PDF operations happen directly in your browser using JavaScript. Your files never leave your device, ensuring complete privacy and security.
Lightning Fast
Process multiple PDFs in seconds. Our optimized algorithms can merge 50 PDFs or split 100-page documents in under 30 seconds.
No Registration Required
Start using PDF Ninja immediately. No account creation, no email verification, no personal information needed.
Completely Free
All features are 100% free with no limitations. No premium plans, no hidden costs, no watermarks on your documents.
Multi-Language Support
Use PDF Ninja in your preferred language. Available in English, Spanish, Chinese, German, French, Italian, Japanese, and Russian.
Mobile Friendly
Works perfectly on desktop, tablet, and mobile devices. Edit PDFs anywhere, anytime.
1
Upload Your Files
Drag and drop PDF files or click to select from your device
2
Process
Merge, split, or edit your PDFs with our easy-to-use tools
3
Download
Get your processed PDF instantly - ready to use
100K+
PDFs Processed Monthly
50
Max Files per Merge
100MB
Max File Size
30s
Average Processing Time
| Feature | PDF Ninja | Online Services | Premium Tools |
|---|---|---|---|
| Price | Free | $5-15/mo | $15-25/mo |
| Browser-based | Yes | Yes | Partial |
| Files uploaded to server | No | Yes | Yes |
| Registration required | No | Yes | Yes |
| Processing speed | Under 30s | 30-60s | 1-2 min |
| File size limit | 100MB | 2-5GB | Unlimited |