Merge PDF
Join several PDFs into one.
Everything runs right here in your browser, on your own device.
Drop your PDFs here
or choose files from your device
Choose files to get started.
Choose. Change. Download.
Drop them in the box or choose them from your device.
Set the options and press the tool’s button.
Check it and save it. Your originals stay unchanged.
Step-by-step instructions
Choose multiple documents and arrange them with the arrow buttons. Pages are copied without being turned into images, so text normally stays selectable. The final order runs from top to bottom. None of your original files are changed.
When to use it
Bring invoices, class notes or application attachments together. Check which document comes first and look for duplicate pages. Keep the originals too if you need interactive forms or verifiable signatures.
Before you start
This does not repair damaged files or guarantee that forms, bookmarks and cross-document links survive. It does not compress PDFs: the output can be slightly larger than the combined originals.
Common questions
Are my PDFs uploaded anywhere?
No. Processing is local and we do not store files or filenames on a server. GitHub Pages receives normal page requests and may log connection information. This version has no analytics, advertising or trackers.
Is it free? Is there a daily limit?
Yes. There is no daily limit, per-document quota or paid plan. Run successive batches as needed. Safety limits are 150 MB per file, 500 pages for rendering and 25 million pixels per page. Available memory may impose lower limits.
Does it work on a phone?
Yes, in modern browsers. A computer often has more memory for large documents. Keep the tab open during processing and check the PDF before sending it.