Merge PDFs

Combine files into one PDF

Drop PDFs here

Up to 100 MB each · stays on this device

How to merge PDF files

1
Upload your PDFs
Drop two or more PDF files onto the uploader. You can add more files after the initial upload.
2
Reorder as needed
Drag and drop the file cards to set the exact order you want in the final PDF. Thumbnail previews help you confirm you have the right documents.
3
Download the merged file
Click Merge PDF. The combined document is built locally and downloaded straight to your device - nothing leaves your browser.

Merging PDFs used to mean installing desktop software or trusting a random website with your documents. The PDF merge tool in PDFsuite works entirely offline inside your browser, so sensitive contracts, financial statements, or personal files stay private. Drag multiple PDFs onto the page, reorder them with a simple drag, and hit Merge - the whole process takes under a minute.

Because everything runs client-side, there is no upload wait, and file size is limited only by your device rather than a server. Large presentation decks, scanned archives, or batches of invoices all merge at the same speed your machine can process them. The tool uses pdf-lib to stitch documents together while preserving bookmarks, links, and embedded fonts from each source file.

The merged file has no watermark, and it is yours the moment you click download. If you need to merge PDFs regularly - weekly reports, monthly statements, compiled research - the tool works just as well the hundredth time as it does the first.

Common questions

Does it work offline?: Yes. Once the page has loaded in your browser, merging works without an internet connection, and the Mac app works offline all the time.
Do my files get uploaded to a server?: No. Every file you add stays in your browser. The merge runs locally using JavaScript and pdf-lib - nothing is transmitted to any server at any point.
How many PDFs can I merge at once?: It depends on your device rather than a fixed count - merging dozens of large PDFs may take a few seconds on slower machines, but the browser handles it without any server involvement.

Related tools

Split
Break a PDF into separate files
Reorder pages
Drag pages into a new order
Extract pages
Save selected pages as a new PDF
Compress
Make a PDF smaller for email or web

How to merge PDF files

Upload your PDFs

Drop two or more PDF files onto the uploader. You can add more files after the initial upload.

Reorder as needed

Drag and drop the file cards to set the exact order you want in the final PDF. Thumbnail previews help you confirm you have the right documents.

Download the merged file

Click Merge PDF. The combined document is built locally and downloaded straight to your device - nothing leaves your browser.

Common questions

Does it work offline?

Yes. Once the page has loaded in your browser, merging works without an internet connection, and the Mac app works offline all the time.

Do my files get uploaded to a server?

No. Every file you add stays in your browser. The merge runs locally using JavaScript and pdf-lib - nothing is transmitted to any server at any point.

How many PDFs can I merge at once?

It depends on your device rather than a fixed count - merging dozens of large PDFs may take a few seconds on slower machines, but the browser handles it without any server involvement.