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HTTP Status Codes

New

Complete reference for HTTP response codes

100
Informational

Continue

The server has received the request headers and the client should proceed to send the request body.

RFC Standard
MDN Docs
101
Informational

Switching Protocols

The requester has asked the server to switch protocols.

RFC Standard
MDN Docs
200
Success

OK

Standard response for successful HTTP requests.

RFC Standard
MDN Docs
201
Success

Created

The request has been fulfilled, resulting in the creation of a new resource.

RFC Standard
MDN Docs
202
Success

Accepted

The request has been accepted for processing, but the processing has not been completed.

RFC Standard
MDN Docs
204
Success

No Content

The server successfully processed the request and is not returning any content.

RFC Standard
MDN Docs
301
Redirection

Moved Permanently

This and all future requests should be directed to the given URI.

RFC Standard
MDN Docs
302
Redirection

Found

The resource was found, but at a different URI.

RFC Standard
MDN Docs
304
Redirection

Not Modified

Indicates that the resource has not been modified since the version specified by the request headers.

RFC Standard
MDN Docs
400
Client Error

Bad Request

The server cannot or will not process the request due to an apparent client error.

RFC Standard
MDN Docs
401
Client Error

Unauthorized

Similar to 403 Forbidden, but specifically for use when authentication is required and has failed or has not yet been provided.

RFC Standard
MDN Docs
403
Client Error

Forbidden

The request contained valid data and was understood by the server, but the server is refusing action.

RFC Standard
MDN Docs
404
Client Error

Not Found

The requested resource could not be found but may be available in the future.

RFC Standard
MDN Docs
405
Client Error

Method Not Allowed

A request method is not supported for the requested resource.

RFC Standard
MDN Docs
408
Client Error

Request Timeout

The server timed out waiting for the request.

RFC Standard
MDN Docs
429
Client Error

Too Many Requests

The user has sent too many requests in a given amount of time.

RFC Standard
MDN Docs
500
Server Error

Internal Server Error

A generic error message, given when an unexpected condition was encountered and no more specific message is suitable.

RFC Standard
MDN Docs
502
Server Error

Bad Gateway

The server was acting as a gateway or proxy and received an invalid response from the upstream server.

RFC Standard
MDN Docs
503
Server Error

Service Unavailable

The server cannot handle the request (because it is overloaded or down for maintenance).

RFC Standard
MDN Docs
504
Server Error

Gateway Timeout

The server was acting as a gateway or proxy and did not receive a timely response from the upstream server.

RFC Standard
MDN Docs

Status Code Quick Reference

HTTP status codes are divided into five classes: 1xx (Informational), 2xx (Success), 3xx (Redirection), 4xx (Client Error), and 5xx (Server Error). They help developers understand the result of an HTTP request and debug issues effectively.