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Duplicate Cleaner vs AllDup: catalog facts
Duplicate Cleaner	AllDup
Freemium Free edition available; Duplicate Cleaner Pro is paid.	Free Freeware, free for private users and companies.
Windows	Windows
Finds similar images even after editing or resizing Matches music by audio or tags	Many comparison methods, including similar images and music Scans inside ZIP, RAR and 7Z archives
Windows only Video matching requires the paid Pro edition	Windows only Closed source
Downloadable app	Downloadable app
Closed source	Closed source
License not stated	License: Freeware
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 24, 2026

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