HTTP Headers Analyzer

Paste raw HTTP response or request headers to inspect cache behavior, security headers, CORS, content type, and cookies.

Reference

HTTP Headers notes

What is HTTP Headers?

HTTP headers are metadata fields sent with requests and responses. They describe caching, content type, compression, cookies, CORS, security policies, and connection behavior.

How does the HTTP Headers tool work?

The analyzer parses raw header lines into names and values, then classifies common headers into cache, security, CORS, cookie, content negotiation, or general signals.

When should you use HTTP Headers?

  • Checking whether a response is cacheable
  • Reviewing security headers such as HSTS and CSP
  • Inspecting CORS behavior during API debugging
  • Turning copied headers into a readable table

What are the limitations of HTTP Headers?

  • The tool does not make network requests by itself
  • Header quality depends on application context and deployment requirements
  • Some proprietary headers may only be classified as general

HTTP Headers examples

cache cache-control: max-age=3600 -> Cache signal
security strict-transport-security: max-age=31536000 -> Security signal
cors access-control-allow-origin: * -> CORS signal
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