HTTP Status Code Reference
Look up what any HTTP status code means, with a searchable list.
What is the HTTP Status Code Reference?
Every response an HTTP server sends back starts with a three-digit status code that tells the client what happened — whether the request succeeded, was redirected, contained an error, or the server itself failed. This tool is a searchable reference of the standard codes defined across the HTTP specifications, from the RFC-defined 1xx informational codes through the widely used 2xx, 3xx, 4xx and 5xx ranges.
How to use it
- Type a status code (like "404") or a keyword (like "redirect" or "unauthorized") into the search box.
- Browse the filtered results for the code's official name and what it typically means.
The first digit of a status code tells you the general category at a glance: 1xx is informational, 2xx means success, 3xx means further action (usually a redirect) is needed, 4xx means the client made a bad request, and 5xx means the server itself failed. This is a handy quick-reference while debugging an API integration, reading server logs, or figuring out why a browser network tab is showing an unfamiliar code.
Want the "why" behind this tool? Read Why HTTP Status Codes Start With 1, 2, 3, 4 or 5.