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1M+ Monthly Users

Merge PDF Files in Seconds

Combine multiple PDFs into a single document instantly. No uploads, no limits, 100% free and secure.

Lightning Fast Processing
100% Private & Secure
No File Size Limits

Drop PDF files here

or click to browse from your computer

Max file size: 100MB•Max files: 20

Visual Reordering

See PDF previews and drag to reorder

100% Private

Files never leave your browser

No Limits

Unlimited merges, no registration

The Ultimate Free PDF Merger Tool

Filator's PDF Merger is the fastest and most reliable way to combine multiple PDF files into a single document. With over 1 million users monthly, our tool processes PDFs entirely in your browser using cutting-edge WebAssembly technology, ensuring your files never leave your device.

Why Choose Filator's PDF Merger?

⚡ Lightning Fast Performance

Merge PDFs in under 100ms using WebAssembly. Our optimized algorithms ensure the fastest processing times, even for large files.

🔒 Complete Privacy

Your PDFs never leave your browser. All processing happens locally on your device, ensuring 100% privacy and security.

♾️ No Limitations

Merge unlimited PDFs with no file size restrictions. No registration, no watermarks, no hidden fees - completely free forever.

🌐 Works Everywhere

Compatible with all modern browsers on any device. Works offline after first load, perfect for sensitive documents.

How to Merge PDF Files

  1. 1.Click "Select PDF Files" or drag and drop your PDFs into the upload area
  2. 2.Arrange the PDFs in your desired order using the up/down arrows
  3. 3.Optionally set document metadata like title and author
  4. 4.Click "Merge PDFs" to combine all files into one document
  5. 5.Download your merged PDF instantly - no waiting!

Advanced Features

  • • Preserve Quality: Maintains original PDF quality and formatting
  • • Custom Metadata: Set title, author, and subject for your merged PDF
  • • Reorder Pages: Arrange PDFs in any order before merging
  • • Batch Processing: Merge up to 20 PDFs at once
  • • Cross-Platform: Works on Windows, Mac, Linux, iOS, and Android
  • • Offline Support: Works without internet after initial load

Common Use Cases

📄 Document Management

Combine invoices, contracts, or reports into organized documents

🎓 Academic Work

Merge research papers, assignments, or study materials

💼 Business Reports

Create comprehensive reports from multiple PDF sources

📚 E-book Creation

Combine chapters or sections into complete e-books

Frequently Asked Questions

Is the PDF merger really free?

Yes! Our PDF merger is 100% free with no hidden costs, watermarks, or limitations. You can merge unlimited PDFs without creating an account.

Are my PDFs secure?

Absolutely. All processing happens in your browser using WebAssembly. Your files never leave your device and we cannot access them.

What's the maximum file size?

Each PDF can be up to 100MB, and you can merge up to 20 PDFs at once. This is more than sufficient for most use cases.

Can I use this on mobile?

Yes! Our PDF merger works perfectly on all modern mobile browsers including Safari on iOS and Chrome on Android.

Ready to Merge Your PDFs?

Join over 1 million users who trust Filator for their PDF merging needs. Fast, secure, and completely free - try it now!