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Two developer & design tools, side-by-side. See which fits your task.
Developer & Design
Check color contrast ratio for WCAG AA and AAA compliance. Suggests closest passing colors.
Open Contrast CheckDeveloper & Design
Reference for CORS HTTP headers, preflight requests, and configuration.
Open CORS HeadersYour specific task is check color contrast ratio for wcag aa and aaa compliance. Open the page, drop your input, get the result — typically under a second.
Your goal is reference for cors http headers, preflight requests, and configuration. Same approach: paste in, get the result, move on. No account, no upload.
Both tools live in the same category, so the choice depends on the exact subtask. Contrast Check focuses on check color contrast ratio for wcag aa and aaa compliance; CORS Headers focuses on reference for cors http headers, preflight requests, and configuration. Try whichever description matches your goal more closely — they're both free.
Yes — both tools are free for unlimited personal use. The Pro plan unlocks higher limits and batch features but the core functionality stays free forever.
Absolutely. Many users chain multiple tools together — process a file with one, then feed the result into another. Nothing is uploaded, so chaining is essentially instant.
No. Both Contrast Check and CORS Headers work without signup. We only ask for an email if you decide to subscribe to a paid plan.