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jdupes vs AllDup: catalog facts
jdupes	AllDup
Free Free and open source under the MIT licence.	Free Freeware, free for private users and companies.
Windows, macOS, Linux, Command line	Windows
Fast duplicate detection across large folders Can replace duplicates with hard links or symlinks	Many comparison methods, including similar images and music Scans inside ZIP, RAR and 7Z archives
Command-line only, with no graphical interface Deletion options need care to avoid removing wanted files	Windows only Closed source
Downloadable app	Downloadable app
Open source	Closed source
License: MIT	License: Freeware
No account needed	No account needed
Works offline	Works offline
Official website Full listing and sources Checked October 2, 2026	Official website Full listing and sources Checked September 24, 2026

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