401 Unauthorized lacks authentication. 403 Forbidden authenticated but not allowed.

400 malformed syntax. 422 syntactically valid, business validation fails.

418 I'm a teapot real?

Tak — April Fools RFC 2324. IANA registry. Easter egg.

Unassigned. Custom 5xx z vendors (Cloudflare 520-527).

Dla programistówZa darmoDziała lokalnie

Lookup kodów statusu HTTP

Look up kody HTTP 1xx–5xx z angielskim opisem.

Szukaj

Klasa

100Continue
Server received the request headers; client should send the body.
101Switching Protocols
The server is switching protocols as requested by the client.
102Processing
Request received but not yet processed (WebDAV).
103Early Hints
Used to return some response headers before final HTTP message.
200OK
Standard success response.
201Created
Request succeeded and a new resource was created.
202Accepted
Request accepted for processing but not completed.
203Non-Authoritative Information
Returned metadata is from a third-party copy.
204No Content
Request succeeded but no content is returned.
205Reset Content
Request succeeded; client should reset the document view.
206Partial Content
Range request succeeded; partial content returned.
207Multi-Status
Body contains multiple statuses (WebDAV).
208Already Reported
Members of a DAV binding already enumerated.
226IM Used
Server fulfilled a GET request and the response is the result of one or more instance-manipulations.
300Multiple Choices
Request has more than one possible response.
301Moved Permanently
Resource moved to a new permanent URL.
302Found
Resource is temporarily at a different URL.
303See Other
Client should follow the response to a new URL with GET.
304Not Modified
Cached version is still valid; no body returned.
307Temporary Redirect
Same method should be used at the new URL.
308Permanent Redirect
Same as 301 but the request method must not change.
400Bad Request
Server cannot or will not process due to a client error.
401Unauthorized
Authentication required and has failed or not been provided.
402Payment Required
Reserved for future use, sometimes used for paywalls.
403Forbidden
Server understood but refuses to authorize.
404Not Found
The requested resource could not be found.
405Method Not Allowed
Request method is known but not supported by the resource.
406Not Acceptable
Resource cannot produce content matching the Accept headers.
407Proxy Authentication Required
Client must authenticate with the proxy.
408Request Timeout
Server timed out waiting for the request.
409Conflict
Request conflicts with the current state of the resource.
410Gone
Resource is no longer available and will not be available again.
411Length Required
Content-Length header is required.
412Precondition Failed
A precondition in the request headers was not met.
413Payload Too Large
Request entity is larger than the server is willing to process.
414URI Too Long
URI is longer than the server is willing to interpret.
415Unsupported Media Type
Media format of the request is not supported.
416Range Not Satisfiable
Requested range cannot be served.
417Expectation Failed
Expectation in Expect header could not be met.
418I'm a teapot
Server refuses to brew coffee because it is, permanently, a teapot.
421Misdirected Request
Request was directed to a server unable to produce a response.
422Unprocessable Entity
Request was well-formed but had semantic errors.
423Locked
Resource is locked (WebDAV).
424Failed Dependency
Request failed because of a previous failed request (WebDAV).
425Too Early
Server unwilling to risk processing a replay-vulnerable request.
426Upgrade Required
Client must upgrade to a different protocol.
428Precondition Required
Server requires the request to be conditional.
429Too Many Requests
Client has sent too many requests in a given amount of time.
431Request Header Fields Too Large
Headers are too large for the server to process.
451Unavailable For Legal Reasons
Resource cannot be served for legal reasons.
500Internal Server Error
Generic server error response.
501Not Implemented
Server does not support the request method.
502Bad Gateway
Server received an invalid response from an upstream server.
503Service Unavailable
Server is overloaded or down for maintenance.
504Gateway Timeout
Upstream server did not respond in time.
505HTTP Version Not Supported
HTTP version in the request is not supported.
506Variant Also Negotiates
Internal configuration error in transparent content negotiation.
507Insufficient Storage
Server is unable to store the representation (WebDAV).
508Loop Detected
Server detected an infinite loop while processing (WebDAV).
510Not Extended
Further extensions to the request are required.
511Network Authentication Required
Client needs to authenticate to gain network access.

Źródło: RFC 9110 i rejestr statusów HTTP IANA.

O Lookup kodów statusu HTTP

Lookup Handytool quick reference każdego HTTP status — 100 Continue do 511. Szukaj code, name, fragment; filter by class. RFC 9110, IANA registry, WebDAV extensions.

Funkcje: Lookup kodów statusu HTTP

01
Szukaj code czy meaning
Type code, name, phrase — list filters instant.
02
Class filter
Narrow do 4xx client errors, 5xx server bugs.
03
Angielskie wyjaśnienia
One-sentence summary dla developers.