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Metamorphosis vs jExifToolGUI: catalog facts
Metamorphosis	jExifToolGUI
Free Free and open source under the GPL-3.0 licence.	Free Free and open source.
Linux	Windows, macOS, Linux
Simple graphical metadata editing Native Linux app distributed on Flathub	Graphical access to ExifTool's metadata reading and writing Runs on Windows, macOS and Linux
Small project with a limited set of supported file types Linux only	Depends on ExifTool being available Java Swing interface looks dated next to native apps
Downloadable app	Downloadable app
Open source	Open source
License: GPL-3.0-only	License: GPL-3.0
No account needed	No account needed
Works offline	Works offline
Official website Full listing and sources Checked October 1, 2026	Official website Full listing and sources Checked October 1, 2026

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