About HTTP Security Header Analyzer & Auditor
Audit and inspect HTTP response headers for best security practices. Evaluates Content-Security-Policy (CSP), Strict-Transport-Security (HSTS), X-Frame-Options, X-Content-Type-Options, Referrer-Policy, and Permissions-Policy, awarding a security grade (A+ to F).
Key Capabilities & Features
- Comprehensive security audit of top 6 web defense headers
- Calculates overall security score and letter grade (A+, A, B, C, F)
- Provides actionable configuration recommendations for missing headers
- Pre-loaded sample profiles (High Security vs Insecure Legacy site)
- Parsed key-value table of all response headers with search and copy
How to Use HTTP Security Header Analyzer & Auditor
Paste Response Headers
Copy raw HTTP response headers from DevTools Network tab or curl -I.
Click Audit Headers
The analyzer scores each security policy and highlights vulnerabilities.
Apply Recommendations
Use the provided code snippets to harden your Nginx, Apache, or Cloudflare configuration.
Privacy & In-Browser Execution Guarantee
100% Client-Side. Raw HTTP header strings are evaluated locally inside your browser memory.
Frequently Asked Questions
Why are HTTP security headers critical for web applications?
Security headers like Content-Security-Policy (CSP), Strict-Transport-Security (HSTS), and X-Frame-Options instruct browsers to block XSS attacks, prevent clickjacking, and enforce HTTPS.
What does Strict-Transport-Security (HSTS) do?
HSTS instructs browsers to remember that a site must only be accessed over HTTPS for a specified duration (max-age), blocking man-in-the-middle SSL stripping attacks.
How do I resolve missing security header warnings on my website?
You can configure missing headers in your web server configuration (Nginx add_header, Apache Header set), framework middleware (Helmet in Express/Node.js), or Cloudflare Transform Rules.