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Back to all tools
Design & Color

Free Contrast Ratio Checker Online

Sample Text

The quick brown fox jumps over the lazy dog

21.00:1
Ratio
✓
AA
✓
AAA

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Ubify Media & Design Operations

UI/UX & DIGITAL MEDIA SPECIALISTS

~1 min read
~166 words
VERIFIED SEPTEMBER 2026
Verified for Web Accessibility (WCAG 2.1) & Visual Standards

About This Tool

Contrast Ratio Checker is a free online tool on tools.ubify.app created to streamline daily digital tasks. Check WCAG contrast ratios for accessibility.

How It Works: All operations execute locally in your web browser using client-side JavaScript. This ensures fast results and 100% data privacy since your input never leaves your device.

Key Benefits: • Fast & Private: Runs locally in your browser with zero server data storage. • Completely Free: No registration, daily limits, or paywalls.

How to Use

  1. 1

    Paste or enter your input data into the designated field.

  2. 2

    Choose any desired processing or formatting options.

  3. 3

    Click the primary button to process your data.

  4. 4

    Copy or download the output.

Frequently Asked Questions

What does Contrast Ratio Checker do?

Contrast Ratio Checker allows you to check wcag contrast ratios for accessibility.

Is my data private when using this tool?

Yes, all processing is done locally in your browser. No data is stored on remote servers.

Is Contrast Ratio Checker free?

Yes, it is 100% free with no limits.