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fdupes vs Czkawka: catalog facts
fdupes	Czkawka
Free Free and open source.	Free Free and open source under the MIT licence, with no advertising.
macOS, Linux, Command line	Windows, macOS, Linux, Android
Finds duplicates by file content Interactive or automatic deletion	Finds duplicates, similar images, similar videos and similar music Written in Rust and multithreaded, with caching for repeat scans
Terminal only, with no graphical interface Deleting files needs care to avoid removing the wrong copy	The Czkawka GTK interface ends at 12.0; new work goes to Krokiet Similar-image matching produces false positives you must review
Downloadable app	Downloadable app
Open source	Open source
License: MIT	License: MIT
No account needed	No account needed
Works offline	Works offline
Official website Full listing and sources Checked September 24, 2026	Official website Full listing and sources Checked September 21, 2026

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