Merge PDFs
Ad slot — 728×90
How to merge PDF files — private & free
- Select two or more PDF files (the order you pick them is the merge order).
- Click "Merge & download".
- The combined PDF downloads instantly — nothing is uploaded.
Frequently asked questions
Are my PDFs uploaded when I merge them?
No. The files are combined entirely in your browser using the open-source pdf-lib library. They never leave your device.
Is there a limit on file size or number of PDFs?
There is no imposed limit — you are bounded only by your device’s memory. Because nothing is uploaded, even large files merge quickly.
Is merging free? Are there watermarks?
Completely free, no sign-up, no watermarks, no daily quota. The code is open source (MIT).