Tools
Accessibility Tools
Contrast, readability, and ARIA helpers to make the web usable for everyone.
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Colour Contrast Checker
Check text and background contrast against WCAG 2.1 AA and AAA thresholds.
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Readability Score
Flesch Reading Ease and Flesch-Kincaid grade level for your copy, with plain-English guidance.
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Colour Blindness Simulator
See how a colour appears with protanopia, deuteranopia, tritanopia and achromatopsia.