HTTP Header Checker
Analyze HTTP response headers and security configuration for any URL.
What is an HTTP Header Checker?
An HTTP header checker inspects the response headers returned by a web server when you request a URL. These headers contain important information about the server's configuration, security policies, caching behavior, content type, and more.
Why check HTTP headers?
- Verify security headers like HSTS, CSP, and X-Frame-Options are properly set
- Debug caching issues by inspecting Cache-Control and ETag headers
- Check CORS configuration for API endpoints
- Identify server software and technology stack
- Troubleshoot redirect and authentication issues