Verify text and UI color combinations against WCAG 2.1 Level AA and AAA accessibility standards.
Execution runs 100% locally inside the browser sandbox using HTML5 Canvas, Web Cryptography Subtle API, and Web Workers. Zero egress.
Zero network latency. Operates completely offline with zero dependencies on third-party backend servers or cloud services.
Built according to official RFC specifications, cryptographic test vectors, and enterprise-grade data transformation standards.
Pick foreground text color and background canvas color.
Review the numerical contrast score (e.g. 4.5:1, 7.0:1).
Confirm pass/fail ratings across normal, large, and UI elements.
WCAG 2.1 Level AA requires a minimum contrast ratio of 4.5:1 for body text (under 18pt regular / 14pt bold).
Large text (18pt+ or 14pt+ bold) requires a minimum ratio of 3.0:1 for Level AA.
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