Colour Contrast Checker
Enter a text and background colour to see the contrast ratio and whether it passes WCAG AA and AAA — the core check for making text readable for low-vision users. Runs in your browser.
Runs in your browser — your file never leaves your deviceFrequently asked questions
Is Colour Contrast Checker free to use?
Yes — Colour Contrast Checker is completely free with no limits, no watermarks and no sign-up. It runs in your browser, so there is nothing to pay for.
Are my files uploaded or stored anywhere?
No. This tool does all its work locally in your browser using your own device's power. Your files never leave your device and we never see them.
Do I need to install anything or create an account?
No installation and no account needed. Colour Contrast Checker works on any modern browser — Windows, Mac, Linux, Android and iPhone.
How do I use Colour Contrast Checker?
Open the tool, add your file (or paste your content), adjust any options, then press “Check contrast”. Your result is ready to download in seconds.
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