About the HTTP Headers Parser
HTTP headers communicate essential metadata about response types, caching policies, authentication tokens, and security configurations. When debugging API responses or server configs, inspecting raw header blocks by hand can be disorganized. This HTTP Headers Parser parses raw header text into structured, categorized tables and audits security header compliance.
This tool is essential for web security auditors, backend engineers configuring Nginx/Cloudflare, and frontend developers debugging CORS or caching issues. It categorizes headers into Security, Caching, CORS & Content, and Authentication, while checking for recommended security headers (HSTS, CSP, X-Frame-Options, X-Content-Type-Options).
To use it, paste raw HTTP response or request headers (from Chrome DevTools, curl, or Postman) into the box and click 'Parse HTTP Headers'. The tool renders a formatted table and flags any missing recommended security headers.
For example, pasting response headers from an API immediately highlights whether 'Content-Security-Policy' or 'Strict-Transport-Security' headers are present or missing.
A common security mistake is omitting the 'X-Content-Type-Options: nosniff' header, which allows browsers to MIME-sniff response types and potentially execute malicious scripts.
Tip: Use this tool to verify that your staging and production environments serve consistent caching and security headers.