100% in your browser · files never leave your device

Merge PDF — Free & Private (In-Browser)

Combine PDFs into one file without uploading. Runs locally in your browser. Free and unlimited.

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All free, all private — everything runs in your browser.

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Merge PDFs without uploading to a server

Many online PDF mergers require you to upload invoices, contracts, or tax forms to a third-party server. This tool merges pages with pdf-lib entirely in your browser tab.

Drop two or more PDFs, reorder them if needed, and download a single combined file. Use it when you need a private PDF merger for work documents you would rather not send off-device.

How to use Merge PDF

  1. 1Add two or more PDFs (drag & drop or browse).
  2. 2Reorder with the up/down arrows — this sets the merge order.
  3. 3Click “Merge PDFs”. They’re combined locally with pdf-lib.
  4. 4Download the single merged PDF.

Merge PDF FAQ

Are my PDFs uploaded to merge them?
No. Merging happens locally in your browser using pdf-lib; your documents never leave your device.