Tip: WCAG AA needs 4.5:1 for normal text and 3:1 for large text; AAA needs 7:1 and 4.5:1. Large text means 18pt+ or 14pt+ bold.
📖 What is Color Contrast Checker?
Color Contrast Checker is a free online tool that helps you check text and background contrast against wcag aa and aaa ratios with a live preview. No signup, no downloads — everything runs securely in your browser.
👤 Who Is It For?
For: Developers, data analysts, API testers.
Not for: Enterprise batch processing or offline use.
📋 How to Use
- Enter your input.
- Click the action button.
- Copy or download the result.
💡 Common Use Cases
- Check text and background contrast against WCAG AA and AAA ratios with a live preview
- Quick Color Contrast Checker tasks during daily work
- Formatters workflows without installing software
⚠️ Limitations
Browser-based only — very large files (>100MB) may be slow. No server-side conversion.
📌 Key Facts
- Color Contrast Checker is a free tool for developers.
- All processing runs in your browser — no data is uploaded to any server.
- No signup required for core functionality.
- Part of the ToolPile collection of 40+ free tools.