Contrast Checker WCAG

Check WCAG color contrast — AA and AAA compliance

🔒 Files never leave your browser

Colors

Contrast Ratio 12.63:1
3:1 4.5:1 7:1

WCAG Compliance

Normal Text AA (4.5:1)
PASS
Normal Text AAA (7:1)
PASS
Large Text AA (3:1)
PASS
Large Text AAA (4.5:1)
PASS

Text Preview

The quick brown fox jumps over the lazy dog. (16px normal text)

Large text sample (24px bold)

Small text: 12px - check readability carefully at this size.

How to Use Contrast Checker WCAG

Enter colors

Set foreground and background colors.

View ratio

See contrast ratio and pass/fail badges.

Adjust

Adjust colors to meet WCAG standards.

Why Choose AllTools Contrast Checker WCAG?

  • ✓ 100% free, no account needed
  • ✓ WCAG AA and AAA
  • ✓ Normal and large text
  • ✓ Contrast ratio display
  • ✓ Color swap button
  • ✓ No data stored or transmitted

Why Use This Tool

  • ★ Live preview as you adjust settings
  • ★ Clean, production-ready CSS output
  • ★ No account or sign-up required
  • ★ Copy generated code with one click
  • ★ Works on any device with a modern browser

Related Resources

Pick colors → Generate palettes → Tailwind colors →

Frequently Asked Questions

What is WCAG? ▼
Web Content Accessibility Guidelines. AA requires 4.5:1 for normal text, 3:1 for large text. AAA requires 7:1 and 4.5:1.
Is there a file size limit? ▼
No strict limit. Processing happens in your browser, so capacity depends on your device memory. Most files work smoothly.
Which browsers are supported? ▼
All modern browsers including Chrome, Firefox, Safari, Edge, and Opera on both desktop and mobile.
Can I use this offline? ▼
Yes. Once the page is loaded, the tool works without an internet connection since all processing is local.
Is my data secure? ▼
Yes. Your data never leaves your browser. Nothing is stored on or transmitted to any server.
Does this work on mobile? ▼
Yes. All AllTools tools are fully responsive and work on phones and tablets.

Related Articles

Free CSS Generator — Gradient, Box Shadow, Border Radius, and More — free browser tool guide
Guides

Free CSS Generator — Gradient, Box Shadow, Border Radius, and More

Generate CSS code visually. Gradients, shadows, border radius, animations. Copy-paste ready. No upload, no account.

→
AllTools vs Canva — Free Private Design Tools Alternative — free browser tool guide
Comparisons

AllTools vs Canva — Free Private Design Tools Alternative

Compare AllTools to Canva for design tools. CSS generators, color pickers, OG images, and more — all in browser, no account, no cloud.

→

Related Tools

CSS

Color Picker

Pick and convert colors with alpha and history

Instant Private
Dev

Color Converter HEX/RGB/HSL

Convert colors between HEX, RGB, HSL, and CMYK with live preview

Instant Private
CSS

Color Palette Generator

Generate harmonious color palettes from any base color

Instant Private
CSS

CSS Gradient Generator

Create CSS gradients with live preview and presets

Instant Private
CSS

Tailwind Color Reference

Tailwind CSS color palette — click to copy HEX

Instant Private
CSS

CSS Grid Generator

Build CSS Grid layouts visually — generate code instantly

Instant Private