Merge PDF files online — free and private
Combine several PDFs into one file right in your browser. Your files never get uploaded — all the work happens on your own device. Free, no sign-up, no catch.
Your files never leave your browser
There's no upload. When you open your PDFs here, they're combined entirely on your device using WebAssembly — the bytes never travel to a server, so your documents stay yours. We collect only an anonymous count of how often the tool is used (which operation, and when) to know people find it useful. No file contents, no names, no accounts, no personal data.
No ads, no trackers
No ads. No third-party trackers. No cookies following you around. The only thing stored on your device is your light/dark theme preference.
Free, no catch
This is a free tool and it stays free. It costs almost nothing to run because there's no server doing the heavy lifting — your browser does. No paywall, no “pro” upsell, no watermarks on your output.
How it works
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Add your PDFs — Drop in the files you want to combine, or click to choose them. They stay on your device.
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Arrange, then prune — Reorder the documents into the sequence you want, then deselect any pages you don't want in the result.
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Download — Get one merged PDF. Done.
Built on open source
This tool is free to use (though the app itself is not open source). It's built on open-source software — including the qpdf engine that does the actual PDF work. See everything we stand on →
Frequently asked questions
- Are my files uploaded anywhere?
- No. Everything happens in your browser; your files never leave your device.
- Is the page order preserved?
- Yes. You arrange the documents in the order you want, and the merged PDF follows that order exactly.
- Can I drop pages I don't want?
- Yes. After arranging the documents, you can deselect any individual pages before merging.
- Is it really free?
- Yes — no account, no payment, no watermark.
- Is there a file size limit?
- Limited only by your device's memory, since processing is local.