Color Contrast Checker Online
Our free Color Contrast Checker calculates WCAG contrast ratios between foreground and background colors. Test AA and AAA compliance for normal and large text. Pick colors with native color pickers or enter hex values, swap colors instantly, and see a live text preview with pass/fail badges for each WCAG level.
- Private & secure
- Fast in-browser
- No signup
How to use Color Contrast Checker Online
- Open the tool. Go to Color Contrast Checker on Utilvia. It runs instantly in your browser.
- Enter your values. Fill in the fields. Results update as you type — no signup required.
- Review the output. Check totals, breakdowns, or formatted text before you copy or save.
- Copy or export. Copy the result or download a file. Your inputs stay on this device.
Key features & privacy
Color Contrast Checker Online is built for in-browser use on Utilvia. Work stays on this device whenever the tool runs locally — there is no account wall and no file inbox on our servers.
- Runs in modern browsers with JavaScript and HTML5.
- No signup required to get a result.
- Zero-upload policy on local-first tools — close the tab and the working copy is gone.
- Shareable, indexable URL so you can return to the same utility later.
Frequently asked questions
What is Color Contrast Checker used for?
Check WCAG contrast between two colors with live preview and AA/AAA badges. Use it whenever you need a quick result in your browser.
Is my data private?
Yes. Processing runs locally in your browser whenever possible.
Do I need an account?
No signup or login is required.
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