HTTP Header Checker
Check HTTP response headers for any URL. Analyze server and security headers.
Note: This tool requires the backend API to fetch HTTP headers from remote servers. Browser-based requests are limited by CORS policies.
How to Use HTTP Header Checker
Enter the URL
Type or paste any publicly accessible URL you want to inspect. The tool accepts any valid HTTP or HTTPS URL.
Fetch headers
Click check to send a request and retrieve all HTTP response headers from the server. Results appear instantly.
Analyze the results
Review status codes, security headers, caching policies, and server information. Missing or misconfigured headers are highlighted for easy identification.
About HTTP Header Checker
HTTP header checker online — inspect and analyze HTTP response headers for any URL instantly for free. View status codes, content-type, cache-control, CORS, CSP, HSTS, X-Frame-Options, and all server response headers. Identify missing security headers, misconfigured caching policies, and server technology details. Essential for web developers, security professionals, and SEO specialists auditing website configurations. Check any publicly accessible URL and get a complete breakdown of all HTTP response headers.
Key Features
- Inspect all HTTP response headers for any URL including status codes and server information
- Check security headers like HSTS, CSP, X-Frame-Options, and X-Content-Type-Options instantly
- View CORS configuration and cross-origin resource sharing policies for API debugging
- Analyze cache-control, expires, and ETag headers for optimal caching performance
- Identify missing or misconfigured security headers with actionable recommendations
- Free online HTTP header inspection tool — no signup, no software installation required
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