Free Developer Tool
HTTP Status Code Lookup
Type any HTTP status code from 100 to 599 to instantly see its name, category, plain-English meaning, and a link to the full guide with causes and fixes. Runs entirely in your browser — no login, no waiting.
Tip: you can also press Ctrl/Cmd + K anywhere to search by name or keyword.
About HTTP status codes
Every HTTP response carries a three-digit status code that tells the client how the request was handled. They fall into five classes: 1xx informational, 2xx success, 3xx redirection, 4xx client errors, and 5xx server errors. Knowing the class alone tells you which side to look at first: a 4xx points at the request, a 5xx points at the server. For the complete list, see the status code reference.