Merge PDF files

Combine several PDFs into one document in the order you choose. Merging happens in your browser, so contracts, invoices and statements stay on your device.

Uploaded to servers0 B
Processed locally0 B

Why your files stay on your device

Nothing is uploaded

Most online PDF sites send your file to their servers. PDFMoss does the work inside your browser, so there is nothing to intercept, store or leak.

No limits on uses

There are no daily caps because there are no servers doing the work. Use any tool as often as you like.

Works on your phone

Every tool works on iPhone and Android: pick photos from your gallery and sign with your finger.

Original quality, works offline

Pages and images keep their quality, and once you install the app the tools work without an internet connection.

How to merge PDF files

  1. Drop your PDF files on the page or click to choose them.
  2. Use the arrows to put the files in the order you want.
  3. Click Merge, then download the combined PDF.

Frequently asked questions

How many PDFs can I merge at once?

There is no fixed limit. Because the work happens on your device, the practical limit is your device's memory; merging dozens of normal documents is fine.

Will merging change the quality of my PDF?

No. Pages are copied as they are, so text stays selectable and images keep their original quality.

Can I merge password-protected PDFs?

Yes. Files that only block printing or copying are unlocked automatically. If a file needs a password to open, type it under the file name and it joins the merge.

Are my files uploaded to a server?

No. PDFMoss processes files inside your browser. The counter at the top of the page shows 0 B uploaded because nothing is sent.

Is PDFMoss free?

Yes. Every tool is free to use with no sign-up and no watermark on your files.

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