All Tools

Merge PDF

Combine multiple PDFs into one, in the order you want — all in your browser.

  • No upload
  • Browser-based
  • Free
  • No signup
  • PDF

    Depends on the tool — client-side tools keep files on-device; server tools auto-delete files after processing.

    Frequently asked questions

    Are my PDFs uploaded anywhere?
    No. The merger runs entirely in your browser using the pdf-lib library. Your files never leave your device and nothing is sent to a server.
    Can I reorder the PDFs before merging?
    Yes — use the ↑ and ↓ buttons next to each file, or remove any file with ×. The order in the list is the order in the merged PDF.
    Is there a file size limit?
    There's no hard limit, but very large merges (hundreds of MB) may be slow because all processing happens on your device.
    Does it work with password-protected PDFs?
    It tries to open protected PDFs and skips password prompts. If a file is fully encrypted, the merge may fail — remove the protection first with a dedicated tool.