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fclones vs Rdfind: catalog facts
fclones	Rdfind
Free Free and open source under the MIT licence.	Free Free software under GPL-2.0-or-later.
Linux, Command line	Windows, macOS, Linux, Command line
Finds duplicates by file content, not by name Many options for limiting the search scope	Finds duplicates based on file content rather than filenames Default run creates a results file without removing files
Command-line only unless you install the separate GUI Removing files by mistake is easy without a backup	Windows use is through Cygwin
Downloadable app	Downloadable app
Open source	Open source
License: MIT	License: GPL-2.0-or-later
No account needed	Not stated if an account is needed
Works offline	Works offline
Official website Full listing and sources Checked September 23, 2026	Official website Full listing and sources Checked October 8, 2026

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