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

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