HTTP Status Codes Cheat Sheet

What are HTTP status codes?

An HTTP status code is a server response to a browser’s request. When you visit a website, your browser sends a request to the site’s server, and the server then responds to the browser’s request with a three-digit code: the HTTP status code.

These status codes are the Internet equivalent of a conversation between your browser and the server. They communicate whether things between the two are A-okay, touch-and-go, or whether something is wrong. The first digit of each three-digit status code begins with one of five numbers, 1 through 5; you may see this expressed as 1xx or 5xx to indicate status codes in that range. Each of those ranges encompasses a different class of server response.

Common HTTP status code classes:

• 1xxs – Informational responses: The server is thinking through the request.
• 2xxs – Success! The request was successfully completed and the server gave the browser the expected response.
• 3xxs – Redirection: You got redirected somewhere else. The request was received, but there’s a redirect of some kind.
• 4xxs – Client errors: Page not found. The site or page couldn’t be reached. (The request was made, but the page isn’t valid — this is an error on the website’s side of the conversation and often appears when a page doesn’t exist on the site.)
• 5xxs – Server errors: Failure. A valid request was made by the client but the server failed to complete the request.

1xx: HTTP Inform­ational Codes

Code	Description
100	Continue
101	Switching Protocols
102	Processing WebDAV
103	Checkpoint draft POST PUT
122	Reques­t-URI too long IE7

2xx: HTTP Successful Codes

Code	Description
200	OK
201	Created
202	Accepted
203	Non-Au­tho­rit­ative Inform­ation 1.1
204	No Content
205	Reset Content
206	Partial Content
207	Multi-­Status WebDAV 4918
208	Already Reported WebDAV 5842
226	IM Used 3229 GET

3xx: HTTP Redire­ction Codes

Code	Description
300	Multiple Choices
301	Moved Perman­ently
302	Found
303	See Other 1.1
304	Not Modified
305	Use Proxy 1.1
306	Switch Proxy unused
307	Temporary Redirect 1.1
308	Permanent Redirect 7538

307 and 308 are similar to 302 and 301, but the new request method after redirect must be the same, as on the initial request.

4xx: HTTP Client Error Code

Code	Description
400	Bad Request
401	Unauth­orized
402	Payment Required res
403	Forbidden
404	Not Found
405	Method Not Allowed
406	Not Acceptable
407	Proxy Authen­tic­ation Required
408	Request Timeout
409	Conflict
410	Gone
411	Length Required
412	Precon­dition Failed
413	Request Entity Too Large
414	Reques­t-URI Too Long
415	Unsupp­orted Media Type
416	Requested Range Not Satisf­iable
417	Expect­ation Failed
418	I’m a teapot 2324
422	Unproc­essable Entity WebDAV 4918
423	Locked WebDAV 4918
424	Failed Dependency WebDAV 4918
425	Unordered Collection 3648
426	Upgrade Required 2817
428	Precon­dition Required draft
429	Too Many Requests draft
431	Request Header Fields Too Large draft
444	No Response nginx
449	Retry With MS
450	Blocked By Windows Parental Controls MS
451	Unavai­lable For Legal Reasons draft
499	Client Closed Request nginx

5xx: HTTP Server Error Codes

Code	Description
500	Internal Server Error
501	Not Implem­ented
502	Bad Gateway
503	Service Unavai­lable
504	Gateway Timeout
505	HTTP Version Not Supported
506	Variant Also Negotiates 2295
507	Insuff­icient Storage WebDAV 4918
508	Loop Detected WebDAV 5842
509	Bandwidth Limit Exceeded nostd
510	Not Extended 2774
511	Network Authen­tic­ation Required draft
598	Network read timeout error nostd
599	Network connect timeout error nostd

HTTP Code Comments

WebDAV	WebDAV extension
1.1	HTTP/1.1
GET, POST, PUT, POST	For these methods only
IE	IE extension
MS	MS extension
nginx	nginx extension
2518, 2817, 2295, 2774, 3229, 4918, 5842	RFC number
draft	Proposed draft
nostd	Non standard extension
res	Reserved for future use
unused	No more in use, deprecated

Wikipedia was used to produce all HTTP status codes content: http:/­/en.wi­kip­edi­a.o­rg/­wik­i/H­TTP­_status