Is Color Contrast Checker (A11y) free to use?

Yes, Color Contrast Checker (A11y) on SarmoTools is completely free. All processing happens in your browser — no sign-up, no data collection, no server uploads.

Color Contrast Checker

Ensure your website is accessible by checking the contrast ratio between text and background colors according to WCAG 2.1 guidelines.

Text Color

Background Color

4.5:1

Sample Text

The quick brown fox jumps over the lazy dog.

WCAG AA

Pass

WCAG AAA

Fail

What is Color Contrast Checker (A11y)?

Free online color contrast checker for web accessibility. Instantly verify WCAG 2.1 contrast ratios for text and background colors right in your browser.

How to use this tool?

Our Color Contrast Checker (A11y) works entirely in your browser. All processing is done client-side, meaning your data never leaves your computer. Simply input your content, and the tool will provide instant results with premium accuracy.

Key Features

100% Private: Data stays in your browser.
Lightning Fast: Instant results as you type.
Zero Cost: Free to use forever.