Compare HTTP Header Analyzer with other tools. See why developers choose this free browser-based option.
100% free, no signup required. Works entirely in your browser.
Open HTTP Header AnalyzerEnter HTTP headers.
Headers are parsed and categorized.
See security recommendations.
The tool analyzes all standard HTTP headers including security headers (CSP, HSTS, X-Frame-Options, X-Content-Type-Options), caching directives (Cache-Control, ETag, Expires), CORS headers (Access-Control-Allow-Origin), content negotiation (Content-Type, Accept), and custom application headers. Each header is categorized and explained with best practice recommendations.
Yes, the analyzer flags missing critical security headers and provides actionable recommendations. It checks for the presence and correct configuration of headers like Strict-Transport-Security, Content-Security-Policy, X-Frame-Options, and X-Content-Type-Options. A security score helps you quickly assess your site's header-based protection level.
Paste headers in the standard HTTP format with one header per line (Header-Name: value). You can copy headers directly from browser developer tools, curl output, or HTTP debugging proxies. The parser is flexible and handles various formatting styles including those from popular API testing tools like Postman and Insomnia.
