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dupeGuruCisdem Duplicate Finder
Free

Free and open source under the GPL 3.0.

 Paid

Free download to try, with a paid license for full use.

Windows, macOS, Linux Windows, macOS, iOS
  • Fuzzy image matching finds resized and re-encoded copies
  • Separate music mode that compares tags rather than bytes
  • Compares files by content, not just names
  • Finds similar photos as well as exact duplicates
  • Last release was July 2022 and the project is asking for maintainers
  • Fuzzy matching is slow on very large photo collections
  • Full version requires purchase
  • Closed source
Downloadable app Downloadable app
Open source Closed source
License: GPL-3.0 License not stated
No account needed Not stated if an account is needed
Works offline Works offline

Checked September 21, 2026

Checked October 2, 2026

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