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WCAG Contrast Checker

Check foreground and background color contrast ratios for WCAG 2.1 AA and AAA compliance. Free online accessibility contrast checker for web designers and developers.

Browser-basedNo sign-upNo adsMost inputs process locally

Maintained by T1000 Tools · Site content last updated July 13, 2025

What is WCAG Contrast Checker?

WCAG Contrast Checker is a free, browser-based online tool. Check foreground and background color contrast ratios for WCAG 2.1 AA and AAA compliance. Free online accessibility contrast checker for web designers and developers. No account or installation is needed — open it and start using it immediately.

How to use WCAG Contrast Checker

Using this tool is simple:

  • ✓Open the tool — no sign-up required.
  • ✓Enter your input or configure the options.
  • ✓Your result is generated instantly.
  • ✓Copy or save the output as needed.

Why use WCAG Contrast Checker?

WCAG Contrast Checker is fast, private, and completely free. It runs in your browser without sending data to any server, works on any device, and requires no registration.

Frequently Asked Questions

How do I use WCAG Contrast Checker?
Check foreground and background color contrast ratios for WCAG 2.1 AA and AAA compliance. Free online accessibility contrast checker for web designers and developers. Just open the tool and start using it — no setup required.
Is WCAG Contrast Checker free?
Yes, WCAG Contrast Checker is completely free to use.
Does WCAG Contrast Checker work on mobile?
Yes, WCAG Contrast Checker is fully responsive and works on any smartphone or tablet.
Do I need to sign up?
No — WCAG Contrast Checker requires no account or registration.
Is my data private?
WCAG Contrast Checker is designed for browser-side processing, and T1000 does not store tool input on its servers.

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Link to this tool

If this tool is useful in a guide, classroom page, resource list, or documentation, you can link directly to the canonical T1000 tool URL.

HTML

<a href="https://wcag-contrast.t1000.us">Free WCAG Contrast Checker by T1000</a>

Markdown

[Free WCAG Contrast Checker by T1000](https://wcag-contrast.t1000.us)

Plain link

https://wcag-contrast.t1000.us