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Button Contrast Checker vs Colour Contrast Analyser: catalog facts
Button Contrast Checker	Colour Contrast Analyser
Free Free to use.	Free Free to download, with source code published on GitHub.
Web	Windows, macOS
Tests all buttons and links on a page at once Checks default, hover and focus states	Screen-wide eyedropper for foreground and background Results for WCAG 2.0, 2.1 and 2.2
Only checks buttons and links, not all text on the page Needs a publicly reachable webpage to scan	Windows and macOS only Checks one color pair at a time
Web application	Downloadable app
Closed source	Open source
License not stated	License: GPL-3.0
Not stated if an account is needed	No account needed
Needs internet	Works offline
Official website Full listing and sources Checked October 2, 2026	Official website Full listing and sources Checked September 23, 2026

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