Security Headers Checker
Audit HSTS, CSP, X-Frame-Options, and Referrer-Policy with security letter grades
Security Headers Checker & Auditor
Audit HSTS, CSP, X-Frame-Options, X-Content-Type-Options, and Referrer-Policy with security grades
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What is Security Headers Checker & Auditor?
Audit HTTP security headers, evaluate HSTS, CSP, X-Frame-Options, and calculate your site's security score and letter grade.
The Security Headers Checker scans your server response headers via remote proxy agents, evaluates key defensive headers (Strict-Transport-Security, Content-Security-Policy, X-Frame-Options, X-Content-Type-Options, Referrer-Policy, and Permissions-Policy), and computes an actionable security grade (A+ to F).
How to Use
Enter your website URL (e.g. https://example.com).
Click "Audit Security Headers".
Inspect your security grade (A+ to F).
Review the breakdown of present vs missing headers.
Copy remediation configuration snippets for Nginx, Apache, or Cloudflare.
Why Use This Tool?
Defend against Clickjacking and XSS attacks
Verify Strict-Transport-Security (HSTS) configuration
Inspect Content-Security-Policy (CSP) directives
Get an instant security grade from A+ to F