Color Contrast Checker (WCAG) — Free Online Tool

Free, private, serverless WCAG color contrast checker. Check AA and AAA compliance for text accessibility — 100% client-side.

🔒 100% Private
Completely Free
🌐 Runs in Browser
📦 Export Ready

Color Contrast Checker (WCAG) — Free Online Tool

Tool Workspace

Ready

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  1. Pick foreground and background colors.
  2. See live contrast ratio.
  3. Check AA/AAA pass/fail for normal and large text.

Color Contrast Checker — WCAG Compliance

Check color contrast ratios for WCAG 2.1 AA and AAA compliance. Real-time preview with pass/fail badges for normal and large text.

WCAG Levels

  • AA Normal: 4.5:1 minimum
  • AA Large: 3:1 minimum
  • AAA Normal: 7:1 minimum
  • AAA Large: 4.5:1 minimum

Features

  • Live color preview
  • Color picker + hex input
  • Swap colors button
  • Dark mode support

Frequently Asked Questions

What is WCAG?

Web Content Accessibility Guidelines — standards for web accessibility.

What ratios are needed?

AA normal: 4.5:1, AA large: 3:1, AAA normal: 7:1, AAA large: 4.5:1.

What counts as large text?

14pt bold or 18pt regular and above.

Is my data safe?

Yes. 100% client-side, no data sent anywhere.