Security Headers Checker

Audit common HTTP security headers such as CSP, HSTS, X-Frame-Options, and Referrer-Policy.

Audit URL

This checks response headers server-side, so it works even when browser JavaScript cannot read cross-origin headers.

Header Audit

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Headers This Tool Checks

  
A solid baseline usually includes HSTS, CSP, X-Content-Type-Options, Referrer-Policy, Permissions-Policy, and frame protection. Missing one header is not always critical, but this gives you a fast launch checklist.