Is Merge PDF free to use?
Yes. This tool is free to use in your browser and does not require an account.
Are my files private?
Merge PDF uses pdf-lib in the browser. Selected files are processed locally when the required browser features are available, while application, library, model, security, and limited analytics requests may load separately.
What limits should I know about?
up to 50 files · 100 MB max · 500 pages max. Encrypted or damaged PDFs may need to be unlocked or repaired before this tool can read them.
How many PDFs can I merge at once?
The tool accepts up to 50 PDF files. Browser memory and total file size may make a smaller batch more reliable on some devices.
Does merging change the page content?
The tool combines existing PDF pages in file order. It does not edit the original text or redesign page artwork.