Dup Detector

Dup Detector is a free, open source desktop application for locating duplicate files and reclaiming drive space. Its matching process compares file sizes first, checks partial content next, and performs full content hashing when necessary. The maker says smart hashing can scan 10,000 or more files per second. Multithreaded scanning is supported, and the app describes its memory footprint as minimal. Dup Detector identifies matching files but does not delete them automatically, leaving you to decide what stays or goes. The maker says the code is 100% open source and welcomes inspection and contributions. It also says the application has no analytics, telemetry, or data collection. Dup Detector runs on Linux, macOS, and Windows. The listed Free plan costs nothing and is available forever. GitHub and Discord links provide routes for help and feedback. The maker describes the tool as simple, focused on finding duplicates and recovering storage rather than automatically changing files.

Dup Detector offers a focused, open source way to find duplicate files across major desktop platforms. Its staged matching and manual deletion control support users who want to reclaim space without automatic removal.

Dup Detector suits users who want a free desktop utility for locating duplicate files across Linux, macOS, or Windows. It is appropriate for people who prefer reviewing deletion choices themselves and value open source software.