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Zero-Server Storage  ·  100% Private Your files are processed entirely in your browser. Nothing is uploaded, stored, or seen by anyone — safe for confidential & GDPR/HIPAA-sensitive documents.

Merge PDF Files - Free PDF Merger (No Upload)

No Upload 100% Private Free
You might also need:
Split PDF PDF Compressor PDF to JPG PDF Watermark PDF Page Numbers

Drop your PDF files here

Technical Details

  • PDFs are combined with pdf-lib, an open-source JavaScript library, which copies every page of each file into one new document in the order you added them.
  • Pages are copied as they are: text stays selectable and images are not re-compressed, so there is no quality loss.
  • Bookmarks (the outline panel) from the source files are not carried over to the merged PDF.

Frequently Asked Questions

Is this tool really offline?

Yes. All processing happens in your browser. Your files never leave your device.

Is there a file size limit?

No server limit. Processing depends on your device memory. Files up to 100MB+ typically work fine.

Is it free?

Yes, completely free with no registration required.

Can I change the page order?

Files are merged in the order you add them; remove and re-add a file to move it. To reorder individual pages, merge first, then use Extract Pages.

Can I merge password-protected PDFs?

Not directly. Remove the password first with the Remove PDF Password tool (you will need to know it), then merge.