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viu vs ascii-image-converter: catalog facts
viu	ascii-image-converter
Free Free and open source.	Free Free and open source.
Windows, macOS, Linux, Command line	Windows, macOS, Linux, Command line
Native protocol support for iTerm and Kitty gives sharper image rendering than plain ASCII Written in Rust, so it is fast and has a small footprint	Supports animated GIFs as well as static images Braille art mode gives higher apparent resolution than plain ASCII
Best image quality depends on using a terminal that supports its native protocols Command-line only, aimed at developers comfortable with a terminal	Output is limited by the viewing terminal's color and font capabilities Command-line only, with no graphical interface for non-technical users
Downloadable app	Downloadable app
Open source	Open source
License not stated	License not stated
Not stated if an account is needed	Not stated if an account is needed
Not stated if it works offline	Not stated if it works offline
Official website Full listing and sources Checked September 22, 2026	Official website Full listing and sources Checked September 22, 2026

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