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noVNC vs virt-viewer: catalog facts
noVNC	virt-viewer
Free Free and open source.	Free Free and open source under the GPL version 2 or later.
Web, Self-hosted	Linux
Works in any modern browser, including mobile browsers No VNC viewer to install on the client machine	Supports both SPICE and VNC displays Lightweight single-purpose viewer
Needs a VNC server on the remote machine The NPM package holds only the core library, not the full client	Only a viewer, with no VM management features Mainly useful for virtual machines rather than physical desktops
Web application, Self-hosted	Downloadable app
Open source	Open source
License not stated	License: GPL-2.0-or-later
Not stated if an account is needed	No account needed
Not stated if it 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 September 24, 2026

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