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HTTP Status & MIME Cheat-Sheet

Quick reference for HTTP status codes and MIME types with live filtering and click-to-copy. Status codes are color-coded by class (2xx/3xx/4xx/5xx), covering ~60 standard codes and 60+ common MIME types.

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Showing 62 / 62 · click a row to copy

Code	Reason phrase	Description
100	Continue	Request received; client may continue.
101	Switching Protocols	Server is switching protocols per Upgrade header.
102	Processing	Request received but still processing (WebDAV).
103	Early Hints	Preload hints sent before final response.
200	OK	Request succeeded.
201	Created	Resource created successfully.
202	Accepted	Request accepted, processing not finished.
203	Non-Authoritative Information	Returned meta is from a copy, not origin.
204	No Content	Success but no body returned.
205	Reset Content	Reset the document view.
206	Partial Content	Range request fulfilled partially.
207	Multi-Status	Multiple status codes for sub-requests (WebDAV).
208	Already Reported	Binding members already enumerated (WebDAV).
226	IM Used	Response is an instance-manipulation result.
300	Multiple Choices	Multiple representations available.
301	Moved Permanently	Resource moved permanently to a new URL.
302	Found	Resource temporarily under a different URL.
303	See Other	Retrieve the resource via GET at another URL.
304	Not Modified	Cached copy still valid; not modified.
305	Use Proxy	Resource must be accessed through a proxy.
307	Temporary Redirect	Temporary redirect; keep request method.
308	Permanent Redirect	Permanent redirect; keep request method.
400	Bad Request	Malformed request syntax.
401	Unauthorized	Authentication required or failed.
402	Payment Required	Reserved for future payment use.
403	Forbidden	Authenticated but not allowed.
404	Not Found	Resource not found.
405	Method Not Allowed	HTTP method not allowed for this resource.
406	Not Acceptable	No representation matches Accept headers.
407	Proxy Authentication Required	Must authenticate with the proxy first.
408	Request Timeout	Server timed out waiting for the request.
409	Conflict	Request conflicts with current state.
410	Gone	Resource permanently removed.
411	Length Required	Content-Length header required.
412	Precondition Failed	A request precondition failed.
413	Payload Too Large	Request body too large.
414	URI Too Long	Request URI too long.
415	Unsupported Media Type	Media type not supported.
416	Range Not Satisfiable	Requested range cannot be satisfied.
417	Expectation Failed	Expect header cannot be met.
418	I'm a teapot	Joke code from RFC 2324 (April Fools).
421	Misdirected Request	Request sent to a server that cannot respond.
422	Unprocessable Entity	Semantic errors in request (validation).
423	Locked	Resource is locked (WebDAV).
424	Failed Dependency	Depends on a failed request (WebDAV).
425	Too Early	Server unwilling to risk replay.
426	Upgrade Required	Client must switch to a different protocol.
428	Precondition Required	Request must be conditional.
429	Too Many Requests	Rate limit exceeded.
431	Request Header Fields Too Large	Header fields too large.
451	Unavailable For Legal Reasons	Blocked for legal reasons.
500	Internal Server Error	Generic server error.
501	Not Implemented	Server lacks the requested functionality.
502	Bad Gateway	Invalid response from upstream server.
503	Service Unavailable	Server overloaded or under maintenance.
504	Gateway Timeout	Upstream server timed out.
505	HTTP Version Not Supported	HTTP version not supported.
506	Variant Also Negotiates	Content negotiation config error.
507	Insufficient Storage	Server out of storage (WebDAV).
508	Loop Detected	Infinite loop detected (WebDAV).
510	Not Extended	Further extensions required.
511	Network Authentication Required	Client must authenticate to gain access.