Contrast Checker

Check the contrast ratio of two colors to ensure they meet WCAG accessibility guidelines.

Contrast Ratio
21.00
AA Normal (4.5:1)
AAA Normal (7.0:1)
The quick brown fox jumps over the lazy dog.
This is how your text will look on the selected background.

What is the Contrast Checker?

Check the contrast ratio of two colors to ensure they meet WCAG accessibility guidelines.

Our Contrast Checker is a free, browser-based utility designed to be fast, secure, and easy to use. Because it runs locally, your data never leaves your device.

How to Use the Contrast Checker

  1. Input: Paste or type your data into the relevant input field.
  2. Process: The tool will automatically process your data in real-time, or you can click the action button to trigger it.
  3. Output: Copy the formatted result from the output field. It's that simple!

Why use CoderSwiss Contrast Checker?

  • 100% Private: We don't use server-side processing. Your data stays on your machine.
  • Lightning Fast: No network latency means instant results.
  • Developer Friendly: Built by developers, for developers, with a clean UI and dark mode support.