How to Parse & Analyze HTTP Headers
Parse, inspect, and analyze HTTP response headers from any URL. Check security headers, caching rules, and CORS configuration. Free HTTP header parser.
Open HTTP Header Parser →Step-by-Step Guide
Enter a URL or paste headers
Type a URL to fetch its headers, or paste raw HTTP headers directly from your browser DevTools or curl output. The tool accepts both request and response headers in any standard format.
View parsed results
Each header is parsed and displayed with its name, value, and a plain-English explanation of what it does. Headers are grouped by category — security, caching, CORS, content, and custom headers.
Check security headers
The tool highlights missing security headers like Content-Security-Policy, X-Frame-Options, Strict-Transport-Security, and X-Content-Type-Options. Each missing header includes a recommendation for what to add.
Analyze caching and performance
Review Cache-Control, ETag, Expires, and Vary headers to understand how your responses are cached. The tool explains cache behavior in plain language so you can optimize your caching strategy.
Try It Now — Free
No signup, no download. Runs entirely in your browser.
Open HTTP Header Parser