HTTP Headers Analyzer
Inspect HTTP response headers from any website. Understand security settings, caching behavior, server configuration, and more.
This tool requires a server-side API endpoint to fetch headers while avoiding CORS restrictions. Some headers may be filtered by the target server.
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Understanding HTTP Headers
HTTP headers are key-value pairs sent between clients and servers during HTTP communication. Response headers provide important information about how the server is configured and how the browser should handle the content.
Common Header Types
- Security Headers: Content-Security-Policy, X-Frame-Options, Strict-Transport-Security
- Caching Headers: Cache-Control, ETag, Expires
- Content Headers: Content-Type, Content-Encoding, Content-Length
- CORS Headers: Access-Control-Allow-Origin, Access-Control-Allow-Methods
Why Analyze Headers?
- Verify security configurations (CSP, HSTS, X-Frame-Options)
- Debug caching issues
- Check CORS setup for API development
- Identify server software and configuration
- Optimize performance based on header policies