Merge PDF files

Combine several PDFs into one document. Add your files, put them in the order you want, and download the result. Nothing is uploaded — the merge happens on your device.

Your files stay on your device. This tool reads them in your browser and never sends them to a server.

Need to do more than merge?

PDF Scanner does 22 document jobs on your phone — scanning, splitting, compressing, signing, OCR and conversion, all offline.

See PDF Scanner

How to merge PDF files

  1. Click the box above and select two or more PDF files, or drag them in.
  2. Use the arrows to put them in the order you want them combined.
  3. Click Merge and download — the combined file saves to your device.

Common questions

Are my files uploaded anywhere?

No. The merge runs entirely in your browser using JavaScript. Your PDFs are never sent over the internet, which also means the tool works with no connection once the page has loaded.

Is there a file size limit?

There's no fixed limit, but everything is held in your device's memory. Very large files — several hundred megabytes combined — may be slow or fail on an older phone. The app handles big files more reliably.

Can I merge a password-protected PDF?

Not here — encrypted PDFs need the password removed first. PDF Scanner can do that on your phone.