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Inspect and parse HTTP headers.
The HTTP Header Inspector & Parser is an essential networking and web security tool that parses raw HTTP request and response headers into clear, structured key-value tables. It automatically identifies core networking parameters (Host, User-Agent, Content-Type, Accept-Encoding), detects caching directives (Cache-Control, ETag, Age), and highlights critical security headers (Content-Security-Policy, Strict-Transport-Security, X-Frame-Options, X-Content-Type-Options). Perfect for debugging API responses and validating web server security configurations.
Key security headers include Content-Security-Policy (CSP) to mitigate XSS, Strict-Transport-Security (HSTS) to enforce HTTPS, X-Frame-Options to block clickjacking, and X-Content-Type-Options to prevent MIME-sniffing.
Yes. The parser recognizes both request headers (e.g., Authorization, Cookie, Accept) and response headers (e.g., Set-Cookie, Cache-Control, Server).
Per RFC 7230, headers with duplicate field names (such as Set-Cookie or Accept) are properly preserved and grouped rather than overwritten.
This tool is an offline parser designed for analyzing pasted header blocks without sending outbound HTTP probes, ensuring maximum security and zero firewall restrictions.
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