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HTTP Header & Response Inspector

Network & Web ToolsGo Backend

Inspect HTTP response headers, status codes, latency, and security headers of any URL.

SponsorNon-intrusive

What is HTTP Header & Response Inspector?

Perform server-side HTTP requests to inspect the headers returned by any web server. Analyze caching directives (Cache-Control), security headers (HSTS, CSP, X-Frame-Options), server software headers, and response latency.

How to Use Online

  1. 1
    Enter Target URLInput any public HTTP or HTTPS web address or API endpoint.
  2. 2
    Select Request MethodChoose GET or HEAD request method according to your inspection needs.
  3. 3
    Send Probe RequestClick Inspect to fetch raw response headers and HTTP status codes.
  4. 4
    Audit Security HeadersCheck security compliance for Strict-Transport-Security, Content-Security-Policy, and Cache-Control.

Key Features

  • Supports GET and HEAD methods with custom User-Agent options
  • Analyzes essential security headers (HSTS, CSP, X-Content-Type-Options)
  • Measures exact server response latency in milliseconds
  • Color-coded HTTP status badges (200 OK, 301 Redirect, 404, 500)

Common Use Cases

  • Debugging CORS and caching headers on API endpoints
  • Auditing web security headers for OWASP compliance
  • Investigating redirect loops and CDN cache status

Frequently Asked Questions

HTTP Strict Transport Security (HSTS) informs browsers that the website must only be accessed using HTTPS, preventing man-in-the-middle downgrade attacks.