Color Contrast Checker
Color Contrast Checker - Free online tool. No signup required.
📋 Format & Minify
Switch between readable and minified output.
🌐 Standards Compliant
Output follows official specifications.
🔄 Diff View
Compare input and output side by side.
🔍 Validation
Built-in validation catches errors with helpful messages.
Does it validate input?
Yes, input is validated and clear error messages are shown for any issues.
Which standards does it follow?
Follows the latest official specifications — RFC, W3C, or ECMA as applicable.
Can I integrate this into my workflow?
Bookmark for quick access. The URL updates with settings for sharing configurations.
What browsers are supported?
All modern browsers: Chrome, Firefox, Safari, Edge. Some features need recent versions.
Can I use this on mobile?
Absolutely. Color Contrast Checker is fully responsive and works on smartphones, tablets, and desktop computers. No app download needed.
What browsers are supported?
All modern browsers are supported: Google Chrome, Mozilla Firefox, Apple Safari, Microsoft Edge, and Opera. We recommend keeping your browser updated for the best experience.
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