Merge PDFs

Combine multiple PDF files into one single document in seconds.

100% private — processed on your device

Drop your files here

or click to browse — add as many as you like

Merge options

.pdf

Local processing

Files never leave your device

Need to compress first?

Merge PDF files into a single document in seconds — entirely in your browser. PDF Bunker combines your PDFs locally, so your files are never uploaded to a server.

How it works

  1. 1Drop your PDF files into the upload area, or click to browse and select them.
  2. 2Drag the files to set the order you want them combined in.
  3. 3Enter an output filename for the merged PDF.
  4. 4Click Merge now and your combined PDF downloads straight to your device.

Frequently asked questions

Are my files uploaded to a server?

No. Every merge happens locally in your browser using JavaScript. Your PDFs never leave your device and are never sent to us or anyone else.

Is there a limit on how many PDFs I can merge?

You can merge as many PDFs as you like. On the free tier each file can be up to 25 MB; Pro removes the size limit and adds batch processing.

Does it work offline?

Yes. Once the page has loaded, merging works even with your internet disconnected — the processing engine runs entirely on your machine.

Do I need an account?

No account is required. Anonymous users get up to 5 operations per day; a free account gives you unlimited basic operations.