HTTP Header Checker

Every request to a website starts a conversation you never see — server type, caching rules, security policies, redirects, cookies. The HTTP Header Checker sends a request to any URL and shows you exactly what came back: status code, content type, `Cache-Control`, `Set-Cookie`, security headers like `Content-Security-Policy` and `Strict-Transport-Security`, and anything else the server sent. Useful for debugging CDN and caching issues, auditing a site's security headers, checking redirect chains, or just seeing what a server is running. Paste a URL, get the full header dump.

Enter Target Website URL

Inspects HTTP response status code, server info, security headers, and content-type.

Uncover What Your Web Server Is Really Saying

Every time a browser loads a webpage, an invisible exchange takes place behind the scenes. Web servers send critical metadata—status codes, caching directives, security frameworks, and cookie configurations—before delivering a single pixel of content.

The HTTP Header Checker inspects this underlying network traffic. Enter any target URL to receive a complete, real-time breakdown of the response headers sent directly from the destination server.

Key Capabilities

  • Security Auditing: Instantly verify whether your site deploys vital defensive headers, including Content-Security-Policy (CSP), Strict-Transport-Security (HSTS), X-Frame-Options, and X-Content-Type-Options.
  • Cache & CDN Debugging: Inspect Cache-Control, ETag, Expires, and edge-network headers (such as Cloudflare, Fastly, or Akamai status flags) to confirm content delivery and cache invalidation logic.
  • Redirect & Status Tracking: Trace exact HTTP response codes (200 OK, 301 Moved Permanently, 404 Not Found, 503 Service Unavailable) and verify destination targets before following redirect chains.
  • Cookie & Session Analysis: Inspect Set-Cookie directives, checking flags like Secure, HttpOnly, and SameSite attributes to ensure proper user session handling.
  • Server Fingerprinting: Identify underlying server infrastructure, backend technologies, and content types (application/json, text/html).

How to Use the Tool

  1. Enter URL: Input the full web address (e.g., [https://example.com](https://example.com)) into the input field above.
  2. Run Analysis: Click Check Headers to dispatch a server-side HTTP request.
  3. Review Results: Analyze the structured raw and parsed header response to isolate configuration issues, security gaps, or caching errors.

Whether you are hardening a website against vulnerabilities, optimizing performance over a CDN, or troubleshooting redirect issues, paste your target URL above to inspect the header response payload instantly.