How to merge PDF files
- Select two or more PDF files (you can add more in several goes).
- Drag the list items to reorder if needed (top = first).
- Click Merge PDFs and your combined file downloads.
Is it private?
Completely. The merge happens on your device using your browser — your documents are never uploaded to a server, which makes it faster and safe for sensitive files like contracts or statements.
Benefits
- Combines several PDFs into one file in the order you choose.
- Runs entirely in your browser, so your documents are never uploaded.
- No watermark and no page limit.
- Free and unlimited.
Limitations to know
- Very large or numerous files depend on your device’s available memory.
- It joins pages as they are — it does not re-compress or shrink the result.
- It does not edit the content inside the pages.
Common mistakes to avoid
- Adding the files in the wrong order and only noticing after saving.
- Merging password-protected PDFs without unlocking them first.
- Expecting the combined file to be smaller — merging does not compress.
Alternatives
To pull pages back out use Split PDF; to build a PDF from photos use Images to PDF.
Last updated: August 2026 · Reviewed by the AI Toolbox editorial team.
Frequently asked questions
Is there a file limit?
No hard limit, but very large files depend on your device's memory.
Is it free?
Yes — free, unlimited, no watermark, no sign-up.