What are the common HTTP status code classes?

HTTP Status Code Checker & Reference – Free Online Tool

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Complete searchable database of all HTTP response status codes: 1xx (Informational), 2xx (Success), 3xx (Redirection), 4xx (Client Error), and 5xx (Server Error) with live URL response header tester.

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HTTP Status Code Reference & Checker

Official RFC status codes directory: 1xx, 2xx, 3xx, 4xx, 5xx

2002xx

OK

Standard response for successful HTTP requests.

2012xx

Created

Request fulfilled; resulted in creation of a new resource.

2042xx

No Content

Server successfully fulfilled request, returning no body.

3013xx

Moved Permanently

Target resource has been assigned a new permanent URI.

3023xx

Found / Temporary Redirect

Resource resides temporarily under a different URI.

3043xx

Not Modified

Resource has not been modified; use cached copy.

4004xx

Bad Request

Server cannot process request due to client syntax error.

4014xx

Unauthorized

Authentication credentials missing or invalid.

4034xx

Forbidden

Server understood request but refuses to authorize it.

4044xx

Not Found

Target resource cannot be found on this server.

4054xx

Method Not Allowed

HTTP request method not supported for target resource.

4294xx

Too Many Requests

Rate limiting: User sent too many requests in given time.

5005xx

Internal Server Error

Unexpected server condition preventing request completion.

5025xx

Bad Gateway

Gateway/proxy received invalid upstream server response.

5035xx

Service Unavailable

Server temporarily overloaded or down for maintenance.

5045xx

Gateway Timeout

Gateway did not receive timely response from upstream.

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HTTP Status Code Checker & Reference is a high-performance, browser-based online utility engineered for everyday digital productivity. Complete searchable database of all HTTP response status codes: 1xx (Informational), 2xx (Success), 3xx (Redirection), 4xx (Client Error), and 5xx (Server Error) with live URL response header tester.

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Got Questions?

Frequently Asked Questions

1xx are informational, 2xx indicate successful requests, 3xx handle URL redirects, 4xx represent client/browser errors, and 5xx represent server issues.