Merge PDF Files
Combine multiple PDFs into a single document — entirely in your browser. No upload. Your files stay private.
About merging PDFs
Merging PDFs combines several separate documents into one file, in the order you choose. This is useful for assembling reports, combining scanned pages, or packaging multiple documents for a single download.
Pixuno merges files entirely in your browser using pdf-lib — no document is ever uploaded to a server. Add your PDFs, reorder them if needed, and download the combined file instantly.
How it works
Add your PDFs
Drop in two or more files — from your device, in any order.
Reorder if needed
Use the up/down arrows to arrange files into the order they should appear in the final document.
Download the merged file
One combined PDF is generated locally and downloaded to your device.
Why use this tool?
Original quality preserved
Pages are copied as-is into the combined document — no re-rendering or re-compression along the way.
No file size roulette
Merging happens on your device, so there's no upload wait and no server-side limit beyond the 150 MB per-file cap.
Reorder before committing
Arrange pages into the right order and see the list update before you ever generate the final file.
FAQ
In what order are the PDFs merged?
Files are merged in the order shown in the list. Add your files, then use the up/down arrows to reorder them before merging.
Is there a limit on how many PDFs I can merge?
There is no hard limit on the number of files, but each file must be under 150 MB and everything is processed using your device's memory.
Can I merge password-protected PDFs?
Encrypted PDFs are not currently supported. Remove the password protection first using a PDF editor, then merge.
Will bookmarks and metadata be preserved?
Page content and formatting are fully preserved. Bookmarks, form fields and some metadata from the original files may not carry over.
Can I merge PDFs of different page sizes?
Yes — each page keeps its own original size in the combined document. Mixed page sizes (like A4 and Letter together) are perfectly valid PDF and display correctly.