Tools / HTTP header checker
HTTP header checker
A plain GET that follows redirects and shows you exactly what the final
server sent back — every header, the status line, and how long each phase took.
Shows
- The request URL and the final URL after redirects.
- Every response header, in order, from the last response.
- Status code and negotiated HTTP version (HTTP/1.1, HTTP/2, HTTP/3).
- Timing: DNS, TCP connect, TLS handshake, time to first byte, total, bytes downloaded.
For a security-focused reading of the same headers (graded, with missing-header analysis) use the security headers analyzer.