Merge PDF

Combine several PDF files into one document, in the order you choose. Private: files never leave your device.

How do I merge PDF files into one?

Select two or more PDF files and press Merge PDFs. The pages of each file are copied, in order, into a single new PDF you can download. The merge happens in your browser with the open-source pdf-lib library, so confidential documents are not uploaded.

How to merge PDFs

Choose all the PDFs to combine (hold Ctrl or Cmd to select several).
Keep Sort files by name ticked to order them 01, 02, 10… — or untick it to keep your selection order.
Press Merge PDFs and download merged.pdf.

Good to know

Password-protected PDFs must be unlocked first.
Need a different order or fewer pages afterwards? Use Organize PDF Pages.
To split a large PDF again, use Split PDF.

Frequently asked questions

Is it safe for confidential documents?

Yes. The files are processed locally in your browser and never uploaded.

How many PDFs can I merge?

As many as your device memory allows — typically dozens of files or thousands of pages.

Will bookmarks be kept?

Page content, images and fonts are kept. Document-level bookmarks (outlines) of the source files are not carried over.