Merge PDF Files
Combine multiple PDF documents into a single file. Drag to reorder, remove the ones you don't need, then merge — all in your browser, free forever.
📚 Your PDF files
Drop PDF files here
or click to browse — you can select multiple files
Merging happens locally in your browser — nothing is uploaded.
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How to merge PDF files
Merging PDFs with UpnixTools takes seconds:
- Add your files — drag & drop them above or click to browse.
- Arrange the order — use the ↑ ↓ buttons to set the page order.
- Merge & download — one click combines everything into a single PDF.
🔒 Your files stay private
The merge runs entirely in your browser with JavaScript. Your PDFs are never uploaded to any server.
Frequently asked questions
Is there a limit on the number of files?
No hard limit — but very large files are constrained by your device's memory, since everything is processed locally in your browser.
Are my PDFs uploaded anywhere?
No. The merge is performed client-side with JavaScript. Your files never leave your computer.
Will the quality change?
No. Merging only reorders and combines pages — the original content is preserved exactly.