Merge PDF
Choose two or more PDFs, arrange them with the up and down buttons, then press Merge PDFs. All pages are copied in order into a new PDF that downloads straight to your device.
This tool runs in an isolated frame on tools.freetoolspro.com. Your files and inputs stay on your device, and advertising on this page cannot read them.
How it works
Pages are copied with pdf-lib, an open-source JavaScript library, including their content, fonts and images. Bookmarks (outlines) and form-field interactivity from the source files may not carry over.
Privacy
Files are read into your browser’s memory inside the isolated tools.freetoolspro.com frame and never uploaded. The frame’s security policy blocks connections to other sites, and advertising on this page cannot read it.
Limits
Encrypted or password-protected PDFs cannot be opened. Up to 300 MB in total; very large documents depend on your device’s memory.
Common questions
Is there a file limit?
No fixed count; total size up to 300 MB.
Will the quality change?
No. Pages are copied, not re-rendered or recompressed.
Methodology reviewed 2026-10-27. Processing details and test approach.