Merge PDF
Combine multiple PDFs into one file. Reorder them however you like before merging. Everything happens in your browser — files are never uploaded anywhere.
Drop in as many PDFs as you need, drag them into the order you want, and download a single combined file. Because merging runs locally using pdf-lib, it works offline once the page has loaded and nothing about your documents is ever sent anywhere.
Frequently asked questions
Is it safe to merge PDFs with sensitive information here?
Yes. Merging happens entirely in your browser using pdf-lib — your files are never uploaded to a server, so nothing leaves your device.
Can I choose the order the PDFs are combined in?
Yes. Drag and drop the files into the order you want before merging; the output follows that order.
Is there a limit on file size or number of PDFs?
There's no hard limit enforced by the tool, but very large files or a large number of PDFs are limited by your device's memory since everything runs client-side.