Free Tool

HTTP Header Checker

Inspect HTTP response headers, status codes and security headers for any URL.

Enter the full URL including https://

Use this free HTTP Header Checker to inspect the response headers returned by any website.

Important Security Headers

Strict-Transport-Security Enforces HTTPS connections (HSTS)
Content-Security-Policy Controls allowed content sources to prevent XSS
X-Frame-Options Prevents clickjacking by disabling iframe embedding
X-Content-Type-Options Prevents MIME type sniffing
Referrer-Policy Controls referrer information sent with requests
Permissions-Policy Restricts browser feature access (camera, mic, etc.)
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