Compare software

tone vs AtomicParsley: catalog facts
tone	AtomicParsley
Free Free to download and use.	Free Free and open source under the GPL-2.0 licence.
Windows, macOS, Linux, Command line	Windows, macOS, Command line
Focused on audiobook metadata Runs on several operating systems	Small, single-purpose command-line tool Handles iTunes-style tags in MP4 and M4A files
No graphical interface Requires familiarity with the terminal	No graphical interface Limited to MPEG-4 files
Downloadable app	Downloadable app
Open source	Open source
License not stated	License: GPL-2.0
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 2, 2026

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