Merge PDF files

Combine two or more PDFs into one document. Free, no sign-up, no watermark — and your files never leave your device.

    How to merge PDF files

    1. Add your PDFs. Click Choose PDF files or drag them onto the box. Add as many as you like.
    2. Put them in order. Drag files up or down the list. The page count of each file is shown so you can check everything is there.
    3. Merge and download. Press Merge PDFs, then Download PDF. Done — usually in a second or two.

    Why use PDF-M?

    🔒 Private by design

    Merging happens inside your browser. Your files are never uploaded to a server, so there is nothing to leak, store or delete.

    ⚡ Fast

    No upload or download queue. Even large documents merge in seconds because the work happens on your own device.

    🆓 Free, no limits

    No account, no watermark, no daily cap and no page limit beyond your device's memory.

    📱 Works everywhere

    Windows, Mac, Linux, iPhone, iPad, Android and Chromebook — any modern browser will do.

    Frequently asked questions

    Is it safe to merge confidential PDFs here?

    Yes. PDF-M never uploads your files. The merging code runs locally in your browser, which is why it keeps working even if you go offline after the page has loaded.

    How many PDFs can I combine?

    As many as you need — two or two hundred. The practical limit is your device's memory; most phones handle several hundred pages comfortably.

    Will the quality of my PDF change?

    No. Pages are copied as they are, so text stays selectable and images keep their original resolution. Nothing is re-compressed.

    Can I merge password-protected PDFs?

    Not directly. Open the file with its password, save or print a copy without protection, then add that copy here.

    Does it work on iPhone and Android?

    Yes. Tap Choose PDF files and pick files from Files, Google Drive or iCloud. The merged PDF downloads to your phone like any other file.

    Do links and bookmarks survive?

    Page content, text and images are kept. Interactive features such as form fields, bookmarks and internal links may not carry over from every file.

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