What do the status codes mean?

2xx is success, 3xx is a redirect, 4xx is a client error (e.g. 404 not found), and 5xx is a server error. We follow redirects and report the final code.

Why do I get a different code than my browser shows?

Browsers follow redirects and may serve cached responses; this tool reports the server’s response and the final status after following redirects.

Can Domnr alert me when a URL breaks?

Yes — Domnr’s uptime monitors check HTTP/TCP endpoints and open an incident the moment the status changes.

HTTP Status Code Checker

Check the HTTP status code a URL returns, following redirects.

About this tool

Status codes tell you whether a page is OK (200), redirects (3xx), is missing (404), or is erroring (5xx). We follow redirects and report the final status.

Frequently asked questions

What do the status codes mean?: 2xx is success, 3xx is a redirect, 4xx is a client error (e.g. 404 not found), and 5xx is a server error. We follow redirects and report the final code.
Why do I get a different code than my browser shows?: Browsers follow redirects and may serve cached responses; this tool reports the server’s response and the final status after following redirects.
Can Domnr alert me when a URL breaks?: Yes — Domnr’s uptime monitors check HTTP/TCP endpoints and open an incident the moment the status changes.