Security Headers Analyzer - Free HTTP Security Header Checker
Analyze HTTP security headers for any website and get actionable recommendations. Check critical headers like Content-Security-Policy (CSP) to prevent XSS, HSTS for HTTPS enforcement, and more. Learn more in our web security audit guide.
Example: Header Analysis Results
URL Analyzed:
https://example.comSecurity Score:
Grade: B (75/100) • 5 headers present • 2 missing • 1 warningKey Findings:
✓ HSTS enabled (max-age=31536000) • ⚠ CSP missing script-src • ✗ X-Frame-Options not setWhat You Can Analyze:
- • Content-Security-Policy (CSP) configuration
- • Strict-Transport-Security (HSTS) settings
- • X-Frame-Options clickjacking protection
- • X-Content-Type-Options MIME sniffing prevention
- • Referrer-Policy privacy settings
- • Permissions-Policy feature restrictions
- • X-XSS-Protection legacy browser protection
Security Checks Performed:
- • Missing security header detection
- • Weak or insecure header values
- • Best practice compliance scoring
- • Specific remediation recommendations
- • CSP directive analysis
- • HSTS preload eligibility
- • Defense-in-depth evaluation
Requests are processed securely via our API. Also use our CSP Generator to build policies or CORS Policy Analyzer to check cross-origin settings.
Need Help Implementing Security Headers?
Our security team can help configure and test security headers across your web applications and infrastructure.
Frequently Asked Questions
Common questions about the Security Headers Analyzer
Essential headers include: Content-Security-Policy (CSP) to prevent XSS, Strict-Transport-Security (HSTS) to enforce HTTPS, X-Content-Type-Options: nosniff to prevent MIME sniffing, X-Frame-Options to prevent clickjacking, and Referrer-Policy to control referrer information. Each provides defense against specific attack vectors. See our complete HTTP security headers guide.
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⚠️ Security Notice
This tool is provided for educational and authorized security testing purposes only. Always ensure you have proper authorization before testing any systems or networks you do not own. Unauthorized access or security testing may be illegal in your jurisdiction. All processing happens client-side in your browser - no data is sent to our servers.