Merge PDFs
Work with your PDF directly in the browser—fast, private, and without uploading the document.
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Privacy & limitations
Your files stay on this device
Every page keeps the page size and orientation it had in its source file — pages are combined as-is and are never rescaled or normalised to a single paper size. Password-protected PDFs cannot be merged. Unlock each file first with the Remove Password tool; this app never attempts to recover or bypass a password. Per-file bookmarks are a first version: entries are named Document 1, Document 2, and so on, because this app never passes file names into the merge job — only privacy-safe ids.
How to use this tool
- Add two or more PDFs to the upload area using drag-and-drop or the file picker — merging needs at least two files.
- Put the files in the order you want them to appear in the final document: select a file and use the up and down arrows to move it, and watch the running page count.
- Choose a bookmarks strategy: no bookmarks, or one top-level bookmark per file so readers can jump straight to where each PDF begins.
- Merge, review the file and page counts on the result screen, then download your combined PDF.
Frequently asked questions
How do I merge PDF files online for free?
Drop two or more PDFs onto this page, arrange them in the order you want, and select Merge. The combined file downloads straight from your browser — nothing is uploaded, so it works the same on iPhone, Android, Mac, or Windows.
Can I merge PDF files on my iPhone without an app?
Yes. Open this page in Safari or Chrome on your iPhone, choose your files from Photos or Files, and merge — the browser does the work, so no App Store download is required.
Is there a limit to how many PDFs I can merge?
There's no fixed cap enforced by the tool itself, but very large combined documents use more of your device's memory since everything happens locally — for dozens of large files, expect it to take longer on lower-memory devices.