Drop, process, download
Processing happens on your device — your documents never leave the browser.
How to use this tool
-
1
Upload your PDF files
Drag and drop two or more PDFs into the upload zone, or click to browse your device.
-
2
Reorder them
Drag the files into the order you want. The first file appears first in the merged document.
-
3
Merge & download
Click Merge PDFs. Your combined file is created locally and downloaded instantly.
Key features
-
100% private
Files are merged on your device and never uploaded to a server.
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Drag-to-reorder
Set the exact page order by dragging files in the list.
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Keeps quality
Pages are copied 1:1 — no re-rendering, no loss of quality.
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Free & unlimited
No sign-up, no page limits, no watermarks.
At a glance
| Aspect | What happens |
|---|---|
| Page quality | Preserved exactly (1:1 copy) |
| File size | Combined size of the sources |
| Order | Drag files to reorder |
| Privacy | Processed on your device only |
Frequently asked questions
Is it safe to merge PDFs online?
Yes. Merging runs entirely in your browser with pdf-lib — your documents never leave your device.
Is there a limit on files or size?
No hard limits. Performance depends on your device memory, but typical multi-file merges are instant.
Does merging reduce PDF quality?
No. Pages are copied 1:1, so text, images and vector graphics are preserved exactly.
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