HTTP Headers Lookup
Free HTTP headers lookup tool for checking security headers and server configuration.
networkFree & Private
FAQ
What headers should I check?▼
Look for Content-Security-Policy, Strict-Transport-Security, and X-Frame-Options.
Why inspect headers?▼
Headers reveal server behavior and help confirm security posture.
Use Cases
Security Review
Verify that important security headers are present
Debugging
Check caching, redirects, and content negotiation behavior
Examples
Header Check
Input:
https://example.com
Output:
curl -I https://example.com