Merge PDF
Combine several PDF files into a single PDF in the order you choose. The files are joined on your device and are not uploaded.
Runs in your browser. Nothing you enter is uploaded.
What it does
Join two or more PDFs into one file, for example to send several scanned documents as a single attachment. Because the work happens in your browser, it is suitable for documents you would rather not send to a website.
How to use it
- Choose the PDFs. You can add files more than once.
- Use the arrows to put them in order, and ✕ to remove one.
- Press Merge, then Download to save merged.pdf.
Worked example
Three files of 2, 5 and 1 pages become one PDF of 8 pages: the pages of the first file, then the second, then the third.
How it works
The tool uses the open-source pdf-lib library. It creates an empty PDF and copies every page from each file into it in order, along with the fonts and pictures those pages use. Pages are copied as they are, so text stays selectable and quality is unchanged.
Questions
Is my file uploaded?
No. The file is opened by your browser on your own device and the result is made there. Nothing is sent to us or to anyone else.
Is there a limit?
Up to 50 files of up to 100 MB each, though very large files may be slow or run out of memory on a phone.
Are bookmarks and form fields kept?
Page content is kept. Bookmarks (the outline) are not carried over, and form fields may not work in the merged file.
Can I merge a password-protected PDF?
No. Remove the password first.
Can I merge only some pages?
Use Split PDF to extract the pages you need, then merge the results.