Merge PDF
Combine PDF files into one, in the order you choose.
Drop PDF files here
Add two or more — you can reorder them next
Files are processed on this device. Nothing is uploaded.
How to use Merge PDF
- Add two or more PDF files (you can add more at any time).
- Put them in order by dragging, or with the up and down buttons.
- Select Merge PDFs and download your combined document.
How it works
Pages are copied exactly as they are (text, images, fonts, links within pages and form appearance) into a new PDF using pdf-lib. Nothing is re-compressed or rasterised, so quality stays identical and text remains selectable.
Merging happens on your device: the files are read into your browser’s memory and the merged PDF is created there. There is no upload, no queue and no limit on the number of files beyond your device’s memory.
Frequently asked questions
Is there a limit on files or size?
No artificial limit. Typical laptops handle hundreds of pages and a few hundred megabytes; phones handle less.
Are bookmarks and form fields kept?
Page content is kept exactly. Document-level extras such as the bookmark outline, interactive form fields and attachments are not carried over.
Can I merge password-protected PDFs?
No. Encrypted PDFs must be unlocked first in a PDF reader.
Can I also reorder pages, not just files?
Merge first, then use Organize PDF to drag individual pages.
Are my documents uploaded?
No. Merging runs in your browser; nothing is sent to a server.
Limitations
- Bookmarks, form fields and attachments are not preserved.
- Password-protected PDFs are refused with an explanation; remove the protection first.
Last reviewed November 9, 2026. How we build and test tools.