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nomacs vs Loupe: catalog facts
nomacs	Loupe
Free Free and open source under the GPL 3.0.	Free Free, developed as part of the GNOME project and supported by donations.
Windows, macOS, Linux	Linux
Opens RAW camera files and Photoshop PSD documents Synchronises pan and zoom between two windows or two machines	Fits naturally into the GNOME desktop Shows image metadata alongside the picture
Not an editor; adjustments are minimal The interface exposes a lot of panels at once	Linux only Editing is limited to basic transforms
Downloadable app	Downloadable app
Open source	Open source
License: GPL-3.0	License not stated
No account needed	No account needed
Works offline	Works offline
Official website Full listing and sources Checked September 21, 2026	Official website Full listing and sources Checked September 23, 2026

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