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F2 vs Name Mangler: catalog facts
F2	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…
Command line	macOS
Dry run by default shows changes before applying them Undo for any rename operation	Preview of new filenames before renaming Fast on very large batches
Command line only, with no graphical interface Regular expression renames take some learning	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 September 23, 2026	Official website Full listing and sources Checked October 2, 2026

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