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Contrast Checker — Free Online Tool

Check WCAG accessibility contrast ratios between two colors.

Quick Answer

ZerofyTools Contrast Checker tests the background and foreground colors of your UI against WCAG AA and AAA accessibility standards. It guarantees high-contrast legibility for all digital users.

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How do I use the Contrast Checker?

Check WCAG accessibility contrast ratios between two colors. This tool runs entirely in your browser — your files and data never leave your device. No registration, no watermarks, no limits.

Select your foreground (text) color.

Select your background color.

Review the WCAG accessibility compliance scores.

What are the key features of the Contrast Checker?

✓Live WCAG AA and AAA checking.
✓Large and small text accessibility validation.
✓Visual visualizers for quick validation.

Why use this tool and other frequently asked questions?

What does AA and AAA compliance mean?

WCAG compliance standards ensure that text is clearly legible to users with visual impairments. AA requires a 4.5:1 ratio, and AAA requires 7:1.

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Contrast Checker Free – Online Tool, No Signup | ZerofyTools