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NTag vs eyeD3: catalog facts
NTag	eyeD3
Free Free and open source under the GPL-3.0.	Free Free to use under the GPL-3.0 license.
Windows, Linux	Command line
Batch editing across many files Supports MP3, M4A, M4B, FLAC, OGG and WMA	Reads and edits ID3v1 and ID3v2.3 and 2.4 tags Reports MP3 playback and encoding details
Fewer automation features than larger taggers Small project with a modest user base	Works with MP3 files rather than a broad range of audio formats Requires Python 3.9 or later
Downloadable app	Downloadable app
Open source	Open source
License: GPL-3.0	License: GPL-3.0
No account needed	Not stated if an account is needed
Works offline	Not stated if it works offline
Official website Full listing and sources Checked October 1, 2026	Official website Full listing and sources Checked October 8, 2026

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