Merge PDF Files Online
Combine any number of PDFs into one flawless document — free, no sign-up, no watermark. Arrange them exactly how you like before merging. Everything happens in your browser, so your files are never uploaded anywhere.
Drop in as many PDFs as you need, drag them into the perfect order, and download a single combined file in seconds. Page quality is preserved exactly — merging copies your pages rather than re-rendering them, so nothing is softened or resampled along the way. And because it all runs locally, it keeps working offline once the page has loaded, with not a byte of your documents leaving the device.
How to merge PDF files
- Add your PDFs. Drag the files onto the drop zone, or click it to browse. You can add as many as you need.
- Put them in order. Drag the files into the order you want them combined, or use the arrow buttons.
- Merge and download. Click Merge PDFs and download the single combined document.
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.