Merge PDF files into one.
To merge PDF files for free, drag your PDFs into the box below, arrange them in the order you want, and click Merge — your combined PDF downloads instantly. Everything runs inside your browser, so your files are never uploaded and never leave your device. No sign-up, no watermark, no file limits.
Every merge runs entirely inside your browser — your files are never uploaded, and nothing ever leaves your device. See all PDF tools →
Questions, answered
Are my files uploaded anywhere?+
No. Plume merges your PDFs directly inside your browser. Your files never leave your device and nothing is sent to a server — you can even merge with your wifi switched off.
Is it really free?+
Yes — unlimited merges, no sign-up, no watermark, and no daily limit. Because the work runs on your device, it costs us almost nothing, so we don’t charge for it.
Is there a file size or count limit?+
There’s no hard limit. Because everything runs on your device, very large files depend on your device’s memory, but typical documents merge in seconds.