Compare software

Massren vs RnR: catalog facts
Massren	RnR
Free Free to use; the repository does not specify a license.	Free Free and open source under the MIT licence.
macOS, Linux, Command line	Windows, macOS, Linux, Command line
Uses the user's existing text editor for batch renames Supports undo and dry runs	Dry run by default with collision checks Undo through operation dump files
Windows releases are discontinued.	Only accepts UTF-8 valid input arguments Requires comfort with regular expressions
Downloadable app	Downloadable app
Closed source	Open source
License not stated	License: MIT
Not stated if an account is needed	No account needed
Not stated if it works offline	Works offline
Official website Full listing and sources Checked October 8, 2026	Official website Full listing and sources Checked September 23, 2026

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