HTML Status Code

Posted in HTML Tutorial

Updated on Nov 20, 2024

By Mari Selvan

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Photo Credit to CodeToFun

What is HTTP Status Code?

HTTP status codes are three-digit numeric codes that are returned by a web server in response to an HTTP request made by a client (such as a web browser).

These status codes provide information about the status of the request and the outcome of the server's attempt to fulfill it.

The HTTP status codes are grouped into different classes, each indicating a specific category of response.

The classes are defined by the first digit of the status code:

1xx - Informational

The request has been received and the server is continuing the process.

Status Code	Message	Explanation
100	Continue	Used to indicate to the client that it can proceed with sending the remainder of the request.
101	Switching Protocols	Used to indicate that the server is switching protocols as requested by the client.
102	Processing	Used to indicate that the server has received and is processing the request, but it has not yet completed the process.
103	Checkpoint	Used to provide the client with some hints or headers before sending the final response.

2xx - Success

The request was successfully received, understood, and processed by the server.

Status Code	Message	Explanation
200	OK	Used to indicate that the client's request has been successfully received, understood, and processed by the server.
201	Created	Used to indicate that a new resource has been successfully created as a result of a client's request.
202	Accepted	Used to indicate that the client's request has been accepted for processing, but the processing is not yet complete.
203	Non-Authoritative Information	Used to indicate that the server is providing a representation of the requested resource that may be from a third-party or non-origin server.
204	No Content	Used to indicate that the server has successfully processed the client's request, but there is no content to be returned in the response.
205	Reset Content	Used to instruct the client to reset the current document and clear any form fields or input values.
206	Partial Content	Used to indicate that the server has successfully fulfilled a partial GET request from the client.

3xx - Redirection

The client needs to take additional action to complete the request.

Status Code	Message	Explanation
300	Multiple Choices	Used to indicate that the requested resource has multiple choices available, and the client should choose one of them to proceed.
301	Moved Permanently	Used to indicate that the requested resource has been permanently moved to a new location.
302	Found	Used to indicate that the requested resource has been temporarily moved to a different location.
303	See Other	Used to indicate that the client should retrieve the requested resource from a different location using a GET request.
304	Not Modified	Used to indicate that the requested resource has not been modified since the client's last request, and the client can use its cached version of the resource.
306	Use Proxy	Used to indicate that the requested resource is available only through a proxy.
307	Temporary Redirect	Used to indicate that the requested resource has been temporarily moved to a different location.
308	Permanent Redirect	Used to indicate that the requested resource has been permanently moved to a different location.

4xx - Client Error

The request contains incorrect syntax or cannot be fulfilled by the server due to client error.

Status Code	Message	Explanation
400	Bad Request	Used to indicate that the server cannot process the client's request due to malformed syntax or other client-side errors.
401	Unauthorized	Used to indicate that the client's request lacks valid authentication credentials for the requested resource.
402	Payment Required	Used to indicate that the payment is required to access the requested resource.
403	Forbidden	Used to indicate that the client's request is understood by the server, but the server refuses to fulfill it.
404	Not Found	Used to indicate that the server cannot find the requested resource.
405	Method Not Allowed	Used to indicate that the requested HTTP method is not allowed for the given resource.
406	Not Acceptable	Used to indicate that the server cannot generate a response that satisfies the client's requested content requirements.
407	Proxy Authentication Required	Used to indicate that the client must authenticate itself with a proxy server before making the requested request. It is part of the HTTP 4xx status code class.
408	Request Timeout	Used to indicate that the server did not receive a complete request from the client within the server's specified timeout period.
409	Conflict	Used to indicate a conflict between the client's request and the current state of the server.
410	Gone	Used to indicate that the requested resource is no longer available on the server and will not be available again in the future.
411	Length Required	Used to indicate that the server requires the "Content-Length" header to be included in the client's request.
412	Precondition Failed	Used to indicate that one or more conditions specified in the client's request headers are not met by the server.
413	Request Entity/Payload Too Large	Used to indicate that the server refuses to process the request because the payload (e.g., request body) is too large.
414	Request-URI Too Long	Used to indicate that the server cannot process the request because the URI (Uniform Resource Identifier) provided by the client is too long.
415	Unsupported Media Type	Used to indicate that the server refuses to accept the request because the media type of the request entity (e.g., request body) is not supported or not acceptable.
416	Requested Range Not Satisfiable	Used to indicate that the server cannot fulfill the client's request because the requested range of a resource is not available or valid.
417	Expectation Failed	Used to indicate that the server cannot meet the expectations specified in the "Expect" request header field.

5xx - Server Error

The server encountered an error while processing the request.

Status Code	Message	Explanation
500	Internal Server Error	Used to indicate an unexpected condition occurred on the server that prevented it from fulfilling the client's request.
501	Not Implemented	Used to indicate that the server does not support the functionality required to fulfill the client's request.
502	Bad Gateway	Used to indicate that the server acting as a gateway or proxy received an invalid response from an upstream server.
503	Service Unavailable	Used to indicate that the server is temporarily unable to handle the client's request.
504	Gateway Timeout	Used to indicate that the server acting as a gateway or proxy did not receive a timely response from an upstream server.
505	HTTP Version Not Supported	Used to indicate that the server does not support the HTTP protocol version used in the client's request.
507	Insufficient Storage	Used to indicate that the server is unable to store the representation needed to complete the client's request.
511	Network Authentication Required	Used to indicate that the client must authenticate itself to gain network access.

These status codes are an essential part of the HTTP protocol and are used to communicate the outcome of a request between the client and the server.

They provide valuable information for developers, allowing them to handle different scenarios and troubleshoot issues when interacting with web servers.