HTTP Header Analyzer
What is a HTTP Header Analyzer?
Parse raw HTTP response headers to inspect security configurations and flag missing best-practice headers (HSTS, Content-Security-Policy, X-Frame-Options, X-Content-Type-Options, CORS).
Why Use This Tool?
- Security Auditing: Identify missing security headers to protect web apps from clickjacking, XSS, and MIME-sniffing.
- Web Server Troubleshooting: Inspect caching headers (`Cache-Control`, `ETag`) and server tokens.
- CORS Inspection: Verify `Access-Control-Allow-Origin` settings for cross-origin APIs.
How to Use
- Paste raw HTTP response headers (from Chrome DevTools or cURL output).
- The analyzer evaluates headers and flags missing security directives in real time.
- Review security score breakdown and header recommendations.
Real Working Example
Input:
HTTP/1.1 200 OK Content-Type: text/<a href="https://developer.mozilla.org/en-US/docs/Web/HTML" target="_blank" rel="noopener noreferrer" class="text-indigo-600 dark:text-indigo-400 font-semibold hover:underline" title="Learn more about HTML on official docs">html</a>; charset=UTF-8 Cache-Control: max-age=3600
Output Result:
Missing Security Headers: Strict-Transport-Security (HSTS), Content-Security-Policy (CSP), X-Frame-Options
Important Technical Details & Features
- Security Directive Checks: Checks presence of HSTS, CSP, X-Frame-Options, X-Content-Type-Options, Referrer-Policy, and Permissions-Policy.
- Header Key-Value Parser: Parses headers into an organized table.
- 100% Local Security: Headers are analyzed locally in browser memory.
Related Web & SEO Tools
- CSP Builder: Build Content Security Policy headers.
- HTTP Status Codes: Browse HTTP response status codes.
- User Agent Parser: Parse User Agent strings.
Frequently Asked Questions
Why are HTTP security headers important?
Security headers tell web browsers how to handle content safely, blocking XSS, clickjacking, and packet sniffing.
What does X-Frame-Options do?
X-Frame-Options stops other websites from embedding your site inside an