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PDF Merge

Combine multiple PDF files into a single PDF online. Files are processed entirely in your browser — nothing is ever uploaded to a server.

Click to select or drag PDF files here Pick several PDFs at once — they sort by name, and you can reorder them below

How to use

  1. Click the drop zone or drag PDF files into it (you can select several at once).
  2. Use the "Move up / Move down" buttons on each item to change the order.
  3. Click "Merge PDFs" to combine the files in the listed order into one PDF.
  4. The result downloads automatically. Everything happens locally — no upload needed.

FAQ

Will my pages lose quality after merging?
No. This tool copies pages as-is without re-compressing or re-encoding them, so the merged output matches the original files exactly.
Are my files uploaded anywhere?
No. Merging runs entirely inside your browser (powered by the open-source pdf-lib library). Your PDFs never leave your device.
Is there a file limit?
No fixed limit, but browser memory applies. For the best speed and stability we recommend merging no more than 20 files under about 200MB total at once.

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