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GabTag vs Tagger: catalog facts
GabTag	Tagger
Free Free and open source under the GPL-3.0-or-later license.	Free Free and open source under the MIT licence.
Linux	Linux
Edits tags across multiple files Can fetch tag information from MusicBrainz	Supports many audio formats in one tool Native GNOME interface
The README lists MP3 files as handled.	Mainly aimed at Linux desktops
Downloadable app	Downloadable app
Open source	Open source
License: GPL-3.0-or-later	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 October 1, 2026

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