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Kid3 vs NTag: catalog facts
Kid3	NTag
Free Free and open source. Hosting, hardware and any external services are separate.	Free Free and open source under the GPL-3.0.
Windows, macOS, Linux, Android	Windows, Linux
Supports multiple audio tag formats Can rename files using tag information	Batch editing across many files Supports MP3, M4A, M4B, FLAC, OGG and WMA
Tagging changes metadata rather than repairing the audio itself.	Fewer automation features than larger taggers Small project with a modest user base
Downloadable app	Downloadable app
Open source	Open source
License not stated	License: GPL-3.0
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 September 22, 2026	Official website Full listing and sources Checked October 1, 2026

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