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Szyszka vs ReNamer: catalog facts
Szyszka	ReNamer
Free Free and open source under the MIT licence.	Free Free to download and use on Windows.
Windows, macOS, Linux	Windows
Multiple renaming rules that can be combined Fast with large numbers of files	Ordered rule chains for precise, repeatable renaming Reads music, photo, video and document metadata into filenames
Development is infrequent GTK interface feels out of place outside Linux	Windows only Not open 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 1, 2026	Official website Full listing and sources Checked October 2, 2026

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