About us

One small task. One straightforward tool.

Just Merge PDF helps you combine several PDF documents into a single file. Add your PDFs, arrange them in the order you want, and download the result. It is free to use and does not require an account.

Your documents stay with you

The merger runs in your browser. Your selected PDFs, their filenames, and the merged document are not uploaded by the app. There is no document inbox or online archive to manage.

How it works

1. Choose at least two PDFs, or drop them onto the merger.
2. Use the up and down buttons to arrange your documents.
3. Choose a filename and select “Merge & download”.

A few useful limits

You can add up to 100 MB of PDFs in total, though very complex documents may exceed your browser’s available memory. Password-protected files need to be unlocked before you add them.

Filled form values are flattened into page content. Bookmarks, digital signatures, and other document-level features may not survive a merge. Keep your originals and check the downloaded file before sharing it.

Built with open-source software

PDF processing uses pdf-lib, distributed under the MIT license.