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GabTag vs Ex Falso: catalog facts
GabTag	Ex Falso
Free Free and open source under the GPL-3.0-or-later license.	Free Free and open source under GPL-2.0-or-later.
Linux	Linux
Edits tags across multiple files Can fetch tag information from MusicBrainz	Edits tags without requiring a music player Supports a broad range of audio formats
The README lists MP3 files as handled.	Linux package evidence is provided
Downloadable app	Downloadable app
Open source	Open source
License: GPL-3.0-or-later	License: GPL-2.0-or-later
Not stated if an account is needed	Not stated if an account is needed
Not stated if it works offline	Not stated if it works offline
Official website Full listing and sources Checked October 8, 2026	Official website Full listing and sources Checked October 8, 2026

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