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Colour Contrast Analyser vs Button Contrast Checker: catalog facts
Colour Contrast Analyser	Button 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	Tests all buttons and links on a page at once Checks default, hover and focus states
Windows and macOS only Checks one color pair at a time	Only checks buttons and links, not all text on the page Needs a publicly reachable webpage to scan
Downloadable app	Web application
Open source	Closed source
License: GPL-3.0	License not stated
No account needed	Not stated if an account is needed
Works offline	Needs internet
Official website Full listing and sources Checked September 23, 2026	Official website Full listing and sources Checked October 2, 2026

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