Free Tool

Security Headers Checker
grade your HTTP headers A to F

Check any URL for security headers including CSP, HSTS, X-Frame-Options, and more. Get an overall grade with per-header remediation guidance.

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No credit card required. Free plan available forever.

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Want the full picture?

SecPortal scans 16 modules beyond headers — SSL, ports, subdomains, cloud exposure, and CVE correlation.

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No credit card required. Free plan available forever.