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HTTP Header Checker

Fetch any public URL and inspect its status line, timing, redirects and response headers.

How to read the result

Shows the status line (e.g. 200 OK, 301 redirect), round-trip time, whether the response is a redirect with its Location target, and every response header as key/value rows. Private/internal targets are blocked (403).

Example

https://example.com → 200 OK, content-type: text/html

FAQ

Why is a redirect shown, not followed?

The checker uses manual redirect mode so you see the 3xx status and Location instead of silently landing elsewhere.

Blocked target (403)?

Private, loopback and internal hostnames are refused for safety. Only public URLs can be checked.

What do cache headers mean?

cache-control, etag and expires tell browsers/CDNs how long to reuse the response.