Merge PDFs
Combine PDF files into one. Runs in your browser.
Drop PDF files here, or tap to choose Add two or more PDFs · nothing is uploaded
How to use
Add your PDF files by dropping them in or choosing them. Each file shows its number of pages.
Use the arrows to put the files in order, then press Merge PDFs to download a single combined file.
FAQ
Is my data sent anywhere?
No. This tool runs entirely in your browser. Nothing you type, paste or upload is sent to a server or stored anywhere.
Is there a file size or page limit?
There is no fixed limit — it depends on your device’s memory. Very large files (hundreds of MB) may be slow on phones.
Can it merge password-protected PDFs?
No. Remove the password in your PDF reader first, then add the file again.
Which library does the merging?
The open-source pdf-lib library (MIT license), running entirely in your browser.