Toolkeel

Merge PDF files

Put several PDFs into one file in the order you choose. Contracts, invoices and scans stay on your computer the whole time.

  • Free
  • No upload
  • No sign-up
  • No watermark
or drop them here Up to 50 files, 100 MB each, 300 MB in total.
    Stays on this device. Network requests since you started: 0 How to check this yourself
    1. Your documentsRead from your device
    2. Worked on in this tabBy code running in your browser
    3. Saved to your deviceYou download the result

    Never sent to a server. See how to check

    How to use it

    1. Add two or more PDF files.

    2. Use the up and down buttons to set the order. Remove any file you do not need.

    3. Select "Merge PDFs" and download the combined file.

    About this tool

    Merging is useful for sending one tidy attachment instead of many: a signed contract plus its appendices, a month of receipts for an expense claim, or scanned pages saved as separate files. Files are joined in the order shown, and you can move each one up or down before merging.

    Pages are copied exactly, so text stays selectable and quality does not change. The tool uses the open-source pdf-lib library, running in your browser.

    Good to know

    • Password-protected (encrypted) PDFs cannot be merged. Remove the password in the program that created the file first.
    • Interactive form fields and bookmarks from the original files may not be kept.
    • Very large files depend on your device memory. 300 MB total is the limit here.

    Frequently asked questions

    Is it safe to merge confidential PDFs here?

    Yes. The files are processed in your browser and never uploaded. You can even disconnect from the internet after the page has loaded and the tool still works.

    Why does it say my PDF is encrypted?

    The PDF has a password or permission lock. Open it in a PDF reader, enter the password, and save or "print to PDF" an unlocked copy, then try again.

    How do I change the order of the files?

    Use the up and down arrow buttons next to each file. The files are merged from top to bottom, exactly as listed.

    Is there a limit on the number of files?

    You can merge up to 50 files at once, up to 100 MB each and 300 MB in total.

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    Last updated 2026-10-20 by the Toolkeel team. How we build and check our tools.