WorkspaceContrast Checker
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Contrast Checker

Check text and background contrast against WCAG ratios. Free contrast checker online, with no installation or account.

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Your files and input are processed in this browser. No uploads or accounts.

Tool capabilities

Input
Options
Output
CSS · Options

How to use Contrast Checker

Check text and background contrast against WCAG ratios. This contrast checker works directly in your browser and is free to use without an account.

  1. Choose a color or enter a supported HEX value.
  2. Adjust the controls and inspect the live visual preview.
  3. Copy the generated color values or CSS.

Contrast Checker · Example

Input

Text: #000000
Background: #ffffff

Output

Contrast ratio: 21:1

Usage notes

Inputs and results are processed on this device. Tool content is not sent to a processing server.

Ratios use opaque sRGB colors and WCAG contrast thresholds. Contrast alone does not establish accessibility conformance.

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Language

Code examples, format names and technical parser messages may use their original notation.