Merge PDFs
Combine multiple PDFs into one, in the order you drop them.
Runs in this tab. The file stays here.
About Merge PDFs
Combine two or more PDFs into one file in your browser, in the order you choose — nothing is uploaded.
The usual merge workflow is: upload half a dozen contracts to a website you will never visit again, wait for a progress bar, download a zip that expires in an hour. That is a bad trade when the files contain client names, bank details, or a signed offer letter.
Drop two or more PDFs here. Reorder with Up/Down if the drop order was wrong. Merge copies pages with pdf-lib into a single document. Pages stay vector when they started that way — this is not a “print to PDF” re-render of every page.
You need at least two files. One PDF is not a merge; use Organize if you only want to drop pages from a single document.
How to use Merge PDFs
- 1Drop two or more PDF files into the workspace.
- 2Use Up/Down to set the page order across files.
- 3Click Merge & download and save the combined PDF.
What it won't do
- Encrypted source PDFs need Remove password first.
- Bookmarks and some interactive features may not carry over the way Acrobat would.
Common questions
Does merge re-encode or flatten my pages?
No. Pages are copied as PDF objects when the library can do that. Vector text and drawings stay vector. Compress is the tool that rasterizes on purpose.
Is there a page limit?
The limit is your device memory and patience, not a server quota. Very large packs (hundreds of heavy pages) can stress a phone browser; a desktop tab handles everyday stacks fine.
Do you keep a copy of the merged file?
No. Work stays in this tab until you download. Close the tab and the in-memory result is gone.
Related tools
Why this one doesn't upload your file
There is no server to upload to. This page is a static file, and the work happens in your browser using the same graphics and WebAssembly code that renders every other site you visit. Your file is read from disk into memory, processed, and handed back as a download. Once the page has loaded you can disconnect from the network entirely and it keeps working. The longer explanation