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ReNamer vs Szyszka: catalog facts
ReNamer	Szyszka
Free Free to download and use on Windows.	Free Free and open source under the MIT licence.
Windows	Windows, macOS, Linux
Ordered rule chains for precise, repeatable renaming Reads music, photo, video and document metadata into filenames	Multiple renaming rules that can be combined Fast with large numbers of files
Windows only Not open source	Development is infrequent GTK interface feels out of place outside Linux
Downloadable app	Downloadable app
Closed source	Open source
License: Freeware	License: MIT
No account needed	No account needed
Works offline	Works offline
Official website Full listing and sources Checked October 2, 2026	Official website Full listing and sources Checked October 1, 2026

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