ScsDedup

ScsDedup finds duplicate files on Windows by content hash instead of by file name.

Renamed, moved, or re-saved copies still show up as the same group, because the fingerprint is computed from the actual bytes rather than the name. Nothing is deleted automatically: you get an HTML or CSV report of duplicate groups and reclaimable space, and you decide what to do afterwards.

It runs locally on your own machine, and the license is a one-time buyout instead of a subscription.