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feh vs Loupe: catalog facts
feh	Loupe
Free Free and open source under a variant of the MIT licence.	Free Free, developed as part of the GNOME project and supported by donations.
Linux, Command line	Linux
Fast and light, usable entirely from the keyboard Slideshow, thumbnail, list and multiwindow modes	Fits naturally into the GNOME desktop Shows image metadata alongside the picture
X11 only Minimal interface with no editing tools	Linux only Editing is limited to basic transforms
Downloadable app	Downloadable app
Open source	Open source
License: MIT-feh	License not stated
No account needed	No account needed
Works offline	Works offline
Official website Full listing and sources Checked September 23, 2026	Official website Full listing and sources Checked September 23, 2026

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