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Szyszka vs Name Mangler: catalog facts
Szyszka	Name Mangler
Free Free and open source under the MIT licence.	Paid 19 USD with a free trial; upgrades cost 9 USD, and it is also on the Mac App…
Windows, macOS, Linux	macOS
Multiple renaming rules that can be combined Fast with large numbers of files	Preview of new filenames before renaming Fast on very large batches
Development is infrequent GTK interface feels out of place outside Linux	Mac only Paid licence after the trial
Downloadable app	Downloadable app
Open source	Closed source
License: MIT	License not stated
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.