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Free Security Tool

CORS Testing Tool

Test whether a URL's CORS policy allows a given origin — simple request and preflight results, wildcard and any-origin-reflection detection, and the browser-rejected Allow-Origin:*+Allow-Credentials:true combination flagged automatically.

Want the full picture? Try the Website Analyzer

Run SEO, security, SSL & technology checks together from one URL.

Tool

Try a public API (usually wide open) next to a plain website (usually same-origin only) to see the difference.

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FAQ

Frequently Asked Questions

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