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Loupe vs nomacs: catalog facts
Loupe	nomacs
Free Free, developed as part of the GNOME project and supported by donations.	Free Free and open source under the GPL 3.0.
Linux	Windows, macOS, Linux
Fits naturally into the GNOME desktop Shows image metadata alongside the picture	Opens RAW camera files and Photoshop PSD documents Synchronises pan and zoom between two windows or two machines
Linux only Editing is limited to basic transforms	Not an editor; adjustments are minimal The interface exposes a lot of panels at once
Downloadable app	Downloadable app
Open source	Open source
License not stated	License: GPL-3.0
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 21, 2026

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