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dupeGuru vs fdupes: catalog facts
dupeGuru	fdupes
Free Free and open source under the GPL 3.0.	Free Free and open source.
Windows, macOS, Linux	macOS, Linux, Command line
Fuzzy image matching finds resized and re-encoded copies Separate music mode that compares tags rather than bytes	Finds duplicates by file content Interactive or automatic deletion
Last release was July 2022 and the project is asking for maintainers Fuzzy matching is slow on very large photo collections	Terminal only, with no graphical interface Deleting files needs care to avoid removing the wrong copy
Downloadable app	Downloadable app
Open source	Open source
License: GPL-3.0	License: MIT
No account needed	No account needed
Works offline	Works offline
Official website Full listing and sources Checked September 21, 2026	Official website Full listing and sources Checked September 24, 2026

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