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Metamorphosis vs Photini: catalog facts
Metamorphosis	Photini
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	Edits Exif, IPTC and XMP metadata Runs on Linux, Windows and macOS
Small project with a limited set of supported file types Linux only	Focused on metadata only, with no image editing Small developer team
Downloadable app	Downloadable app
Open source	Open source
License: GPL-3.0-only	License not stated
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.