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Szyszka vs F2: catalog facts
Szyszka	F2
Free Free and open source under the MIT licence.	Free Free and open source under the MIT licence.
Windows, macOS, Linux	Command line
Multiple renaming rules that can be combined Fast with large numbers of files	Dry run by default shows changes before applying them Undo for any rename operation
Development is infrequent GTK interface feels out of place outside Linux	Command line only, with no graphical interface Regular expression renames take some learning
Downloadable app	Downloadable app
Open source	Open source
License: MIT	License: MIT
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 September 23, 2026

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