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Swayimg vs nsxiv: catalog facts
Swayimg	nsxiv
Free Free and open source.	Free Free open-source software.
Linux	Linux
Wide format support including JPEG XL, HEIC, AVIF and RAW Lua scripting for customization	Very small and fast Keyboard-driven with a thumbnail browsing mode
Linux only and aimed at Wayland Configuration takes more effort than a typical desktop viewer	X11 only Configured by editing source and recompiling
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.