HTTP Headers Viewer
Inspect full HTTP response headers of any page — caching, security headers, CDN config.
The WebURL HTTP Headers tool is a free online tool, no signup required, that shows every HTTP response header a URL returns — use it to verify caching, security headers (HSTS, CSP) and CDN configuration.
About this tool
The HTTP headers viewer shows the complete response headers for any URL: caching policy (Cache-Control), security headers (HSTS, CSP, X-Frame-Options), content types, server info and cookies.
Common troubleshooting: CDN caching not working - check Cache-Control and Age; verifying security hardening - confirm HSTS/CSP are sent; CORS issues - inspect the Access-Control headers.
Security headers sit at the intersection of SEO and security audits: missing X-Content-Type-Options or Referrer-Policy will cost points in security scans.