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.
No credit card required. Free plan available forever.
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Want the full picture?
SecPortal scans 16 modules beyond headers including SSL, ports, subdomains, cloud exposure, and CVE correlation.
No credit card required. Free plan available forever.