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PeriscopedupeGuru
Free

Periscope is free and open source under GPL-3.0.

 Free

Free and open source under the GPL 3.0.

Command line Windows, macOS, Linux
  • Interactive exploration of duplicate files
  • Safe deletion commands require another copy
  • Fuzzy image matching finds resized and re-encoded copies
  • Separate music mode that compares tags rather than bytes
  • Requires an initial filesystem scan
  • Designed for command-line use
  • Last release was July 2022 and the project is asking for maintainers
  • Fuzzy matching is slow on very large photo collections
Downloadable app Downloadable app
Open source Open source
License: GPL-3.0 License: GPL-3.0
Not stated if an account is needed No account needed
Not stated if it works offline Works offline

Checked October 8, 2026

Checked September 21, 2026

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