Merge PDF
Bring your PDFs together, in the order that works for you.
Your files
Add two or more PDFs, then arrange them.
Up to 20 files · 32 MiB per file · 64 MiB total · 1,000 pages
Local processing. Your originals stay untouched.
Combine
No files yet.
The preview opens after you add a PDF.
Add at least two PDFs.
File limits and compatibility
- Whole files are merged in the listed order. Optional previews show the first 40 pages; merging and downloading work without preview support.
- Preview requires browser canvas support and the PDF Studio pack when offline.
- Choosing individual pages inside one file is a later tool.
- This build accepts up to 20 files, 32 MB each, 64 MB together, and 1,000 pages.
- The result is assembled, not recompressed or re-rendered.
- Document-level bookmarks, forms, attachments, and digital signature validity are not preserved as a complete workspace.
- These limits are tested on desktop browsers; physical mobile memory behavior is still unverified.
How to use Merge PDF
- Select Choose PDF files and pick two or more PDFs from this device.
- Put the files in the order you want. Use Add PDFs to bring in more.
- Select Merge PDFs.
- Check the result, then select Download merged PDF.
What happens to your file
Your file is processed by pdf-lib in a worker inside this browser tab. This page's code and assets come from this site. The file, its name and its contents are not sent to Kitolune or anyone else, and a browser test for this tool fails if a run makes a cross-origin or non-GET request.
Common questions
Can I pick individual pages from each file?
Not here. Whole files are joined in the listed order. To drop pages afterwards, use Delete pages on the merged result.
Can I merge a password-protected PDF?
No. Encrypted PDFs are refused, and this tool does not remove a password.