Check WCAG AA / AAA contrast ratios between two colors.
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Normal text — The quick brown fox jumps over the lazy dog.
Large text — Pack my box with five dozen liquor jugs.
Test foreground/background color combinations against WCAG 2.1 contrast requirements. Live preview with pass/fail badges for AA, AAA at normal and large text sizes.
All processing for WCAG Contrast happens locally inside your browser using JavaScript. Your input is never uploaded to a server, logged, or shared with third parties.
Yes. WCAG Contrast is completely free for both personal and commercial projects. There are no usage limits, no sign-up, and no premium tier.
All processing happens locally in your browser using JavaScript. Your input is never uploaded to our servers, logged, or shared with any third party.
Once the page has loaded, the tool runs entirely client-side. You can disconnect from the internet and it will keep working in the same browser tab.
WCAG Contrast works in all modern browsers, including the latest versions of Chrome, Firefox, Safari, Edge, Brave, and Opera, on desktop and mobile.
No. WCAG Contrast runs in any modern web browser with no installation, browser extension, or account required.