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FreeFileSyncrsync
Free

Free to download and use; the project runs on advertising and donations. A paid Donation…

 Free

Free and open source under the GPL.

Windows, macOS, Linux Windows, macOS, Linux, Command line
  • Transfers only the differences between source and target instead of copying everything
  • Saved jobs run unattended in batch mode, suitable for scheduled backups
  • Transfers only the changed parts of files, so repeat syncs are fast
  • Preserves permissions, links and attributes, which makes it safe for system trees
  • The installer and the website carry advertising, and the download page pushes donations hard
  • Some conveniences, including parallel file copying, are reserved for the paid Donation Edition
  • No versioning or snapshots on its own; --delete destroys without warning
  • Command-line only, with a long list of subtle flags
Downloadable app Downloadable app
Open source Open source
License not stated License: GPL-3.0
No account needed Not stated if an account is needed
Works offline Not stated if it works offline

Checked September 20, 2026

Checked September 22, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.