Color Contrast Checker Online

Preview Text 预览文字
Large text / 小号文字
21.00:1
AA Normal
✅ Pass
Requires 4.5:1
AA Large
✅ Pass
Requires 3:1
AAA Normal
✅ Pass
Requires 7:1
AAA Large
✅ Pass
Requires 4.5:1

What is Color Contrast Checker?

Check WCAG contrast ratio between two colors for web accessibility compliance.

How to Use

  1. Open the tool page.
  2. Enter or upload your data.
  3. Click the process button.
  4. View and copy the result.

Features

  • Free to use
  • No signup required
  • Browser-local processing
  • One-click copy
  • Instant processing
  • Multi-format support
  • Data secure
  • Responsive design

FAQ

What is Color Contrast Checker used for?

Check WCAG contrast ratio between two colors for web accessibility compliance.

Do I need to sign up?

No! This tool is completely free, no signup required, just open the page and start using it.

Is my data safe?

Yes. All data processing happens locally in your browser, nothing is uploaded to any server.