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Swayimg vs Loupe: catalog facts
Swayimg	Loupe
Free Free and open source.	Free Free, developed as part of the GNOME project and supported by donations.
Linux	Linux
Wide format support including JPEG XL, HEIC, AVIF and RAW Lua scripting for customization	Fits naturally into the GNOME desktop Shows image metadata alongside the picture
Linux only and aimed at Wayland Configuration takes more effort than a typical desktop viewer	Linux only Editing is limited to basic transforms
Downloadable app	Downloadable app
Open source	Open source
License not stated	License not stated
No account needed	No account needed
Works offline	Works offline
Official website Full listing and sources Checked September 24, 2026	Official website Full listing and sources Checked September 23, 2026

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