Color Contrast Checker is a free online testing and validation tool that runs entirely in your browser. It helps you check, validate, or inspect data quickly and privately.
Paste your data into the input area and Color Contrast Checker analyzes it instantly. Results are displayed clearly, highlighting any issues or providing detailed breakdowns. You can adjust your input and re-check as many times as you like.
The tool provides Free WCAG color contrast checker, Test text and background color contrast against WCAG 2, 1 AA and AAA standards, Real-time preview, luminance. All processing happens locally in your browser, so your data never leaves your device. The interface is designed to make results easy to understand at a glance.
Is my data uploaded anywhere? No — all analysis happens locally in your browser. Is it free? Yes, 100% free. What browsers are supported? All modern browsers including Chrome, Firefox, Safari, and Edge.
Keep https://color-contrast.zaerp.com/ handy for quick, private validation whenever you need it.