Merge PDF Files Online
Combine multiple PDF documents into a single file. Drag and drop to reorder pages. 100% free and private — your files never leave your browser.
100% Private
Files are processed entirely in your browser. Nothing is uploaded to any server.
Lightning Fast
No upload or download wait times. Processing happens instantly on your device.
Works Everywhere
Use on any device with a modern browser. No software installation needed.
How to Merge PDF Files
Add files
Drag and drop or click to select the PDF files you want to merge.
Reorder
Drag files in the list to set the order they appear in the merged document.
Merge
Click "Merge" and your combined PDF will be ready to download instantly.
Frequently Asked Questions
Is there a file size limit?▼
Since processing happens in your browser, the limit depends on your device's available memory. Most devices can handle PDFs up to 100MB without issues. For very large files, ensure you have sufficient RAM available.
Are my files safe?▼
Absolutely. SnapPDF processes everything client-side using JavaScript. Your PDF files never leave your device — they're not uploaded to any server. You can verify this by checking your browser's network tab while using the tool.
Can I merge password-protected PDFs?▼
Currently, password-protected PDFs are not supported. Please remove the password protection before merging. We're working on adding support for encrypted PDFs in a future update.