JSON formatter
Validate and pretty-print JSON, or compress it onto one line.
DeveloperColor contrast checker
Check two opaque sRGB colors against WCAG AA and AAA text contrast thresholds.
Input
Result
Your result will appear here
How to use color contrast checker
Set Text color, Background color. Select Run tool, then review the result. Use the download or copy controls to keep it. Reset restores the starting settings and clears the result.
Normal text needs 4.5:1 for AA or 7:1 for AAA. Large text needs 3:1 for AA or 4.5:1 for AAA. Large means at least 18pt, or 14pt bold. Results use unrounded ratios; transparency and background images are not modeled.
Your files stay here
Inputs are processed in your browser and are not uploaded to an Everytool server. Results last until you reset or leave this page. Favorites and recently used tool names are saved only in this browser.