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puddletag vs NTag: catalog facts
puddletag	NTag
Free Free and open source.	Free Free and open source under the GPL-3.0.
Linux	Windows, Linux
Spreadsheet view shows all tags for many files at once Tag-from-filename and rename-from-tag patterns	Batch editing across many files Supports MP3, M4A, M4B, FLAC, OGG and WMA
Built primarily for Linux Lacks some features found in Mp3tag	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
No account needed	No account needed
Not stated if it works offline	Works offline
Official website Full listing and sources Checked September 24, 2026	Official website Full listing and sources Checked October 1, 2026

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