Compare software

Colour Contrast Analyser vs WebAIM Contrast Checker: catalog facts
Colour Contrast Analyser	WebAIM Contrast Checker
Free Free to download, with source code published on GitHub.	Free Free to use.
Windows, macOS	Web
Screen-wide eyedropper for foreground and background Results for WCAG 2.0, 2.1 and 2.2	Separate results for normal text, large text and UI components Alpha and lightness controls for adjusting colors
Windows and macOS only Checks one color pair at a time	Checks one color pair at a time Does not scan a live page
Downloadable app	Web application
Open source	Closed source
License: GPL-3.0	License not stated
No account needed	No account 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 September 23, 2026

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