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Free Contrast Checker Online
Free Contrast Checker Online is a free online tool by US AI. WCAG AA/AAA ratios It runs completely in your browser — no signup, no download, works on mobile and desktop.
📖 How to use
- Pick a foreground and background color to see the WCAG contrast ratio and AA/AAA pass results, plus a live text preview.
- Open the tool with the button above — it loads instantly.
- Your work stays on your device; nothing is uploaded anywhere.
✨ Why use this tool?
US AI's free contrast checker online is fast, private and 100% free forever. Bookmark this page and share it with anyone who needs it.