Merge PDF Files Online
Combine two or more PDF files into a single document, in the order you choose. Everything happens locally — nothing is uploaded.
- Combine multiple PDFs into one, reorder files before merging.
Frequently asked questions
How do I merge PDFs without uploading them?
Drop your PDF files into the tool above and click Merge PDFs. Everything runs in your browser using JavaScript, so your files are never uploaded to a server — the merge happens entirely on your device.
Is there a limit to how many PDFs I can merge?
You can merge as many PDF files as you like, each up to 50MB. Since processing happens locally in your browser, the only real limit is your device's memory.
Can I change the order of the pages before merging?
Yes. After you add your files, use the up and down arrows next to each one to reorder them — the final PDF follows that order exactly.
Will merging affect the quality of my PDFs?
No. FileTrio copies the original pages directly into the new file using pdf-lib, so text, images, and formatting stay exactly as they were in the source PDFs.