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nsxiv vs pqiv: catalog facts
nsxiv	pqiv
Free Free open-source software.	Free Free and open source under the GPL-3.0-or-later license.
Linux	Linux
Very small and fast Keyboard-driven with a thumbnail browsing mode	Supports multiple image formats, PDFs, PostScript, videos, and archives Includes animations, slideshows, and image preloading
X11 only Configured by editing source and recompiling	GTK 3 based and listed for Linux
Downloadable app	Downloadable app
Open source	Open source
License not stated	License: GPL-3.0-or-later
No account needed	Not stated if an account is needed
Works offline	Not stated if it works offline
Official website Full listing and sources Checked September 23, 2026	Official website Full listing and sources Checked October 8, 2026

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