How to Use the HTTP Security Headers Builder
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1
Toggle desired security headers: CSP, HSTS, X-Frame-Options, X-Content-Type-Options, Referrer-Policy, and Permissions-Policy.
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2
Configure directives (e.g. max-age for HSTS, DENY/SAMEORIGIN for X-Frame-Options, and default-src for CSP).
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3
Select your web server format: Nginx, Apache, Cloudflare / Caddy, or Vercel _headers.
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4
Click "Copy Headers Config" to paste directly into your server block.
Practical Example & Use Case
Common Real-World Scenario
Earning an A+ rating on SecurityHeaders.com by generating hardened Nginx SSL and CSP headers.
Technical Notes & Limitations
Browser Engine Architecture
Generates standard RFC-compliant HTTP response header directives for modern web servers.
Frequently Asked Questions
What is the most crucial header to configure?
Content-Security-Policy (CSP) is the most powerful header for mitigating Cross-Site Scripting (XSS) and data injection attacks.