Merge PDF
Combine several PDF files into one document, in any order you choose. Runs entirely in your browser — nothing is uploaded.
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Runs entirely in your browser — your files never leave your device.
How to use
- Add your PDFsDrop your files onto the box, or click to pick them. You can add them one at a time — each drop is added to the list rather than replacing it, so the files can live in different folders.
- Put them in orderUse the arrows beside each filename to move it up or down. Pages are joined in exactly the order shown.
- Merge and downloadPress Merge PDF. The combined document is built locally and downloads as one file.
Why this runs in your browser
Every step happens locally using WebAssembly. Nothing is uploaded, so there is no queue, no size quota tied to a server, and no copy of your document sitting in someone else’s storage.
Frequently asked questions
Are my files uploaded to a server?
No. The merge happens inside your browser using WebAssembly. Your files never leave your device, which also means there is no upload wait and no file-retention policy to worry about.
How many files can I merge?
Up to 30 files at a time, 100 MB each on desktop. On phones the limit is lower because mobile browsers have a much smaller memory budget.
Can I control the page order?
Yes. After selecting files, use the arrows to move each file up or down. Pages are merged in exactly the order shown.