HTTP Header Checker
Analyze HTTP response headers to check server configuration, security headers, and caching policies
Check HTTP Header
Enter a clear value to return matched value, source detail, reference note. Try https://example.com as a baseline.
Analyze HTTP response headers to check server configuration, security headers, and caching policies. Use a specific http header value so the result matches the right Web Tools task.
Read matched value, source detail, reference note first, then open the extra fields only when they change your next action.
For Web Tools tasks, verify with an official or primary source before relying on the result for money, travel, health, legal, or customer-facing decisions.
Continue with CDN Lookup or HTTP Status Checker when this answer needs a second reference point.