HTTP ステータスコード
説明付きの完全な HTTP ステータスコードリファレンス。カテゴリ (1xx、2xx、3xx、4xx、5xx) で検索・フィルタリングできます。ワンクリックで任意のコードをコピー。
合計: 61
100
Continue
The server has received the request headers and the client should proceed to send the request body.
101
Switching Protocols
The requester has asked the server to switch protocols and the server has agreed to do so.
102
Processing
A WebDAV request may contain many sub-requests involving file operations, requiring a long time to complete the request.
103
Early Hints
Used to return some response headers before final HTTP message.
200
OK
Standard response for successful HTTP requests.
201
Created
The request has been fulfilled, resulting in the creation of a new resource.
202
Accepted
The request has been accepted for processing, but the processing has not been completed.
203
Non-Authoritative Information
The server is a transforming proxy that received a 200 OK from its origin.
204
No Content
The server successfully processed the request, and is not returning any content.
205
Reset Content
The server successfully processed the request, asks that the requester reset its document view.
206
Partial Content
The server is delivering only part of the resource due to a range header sent by the client.
207
Multi-Status
The message body that follows is by default an XML message and can contain a number of separate response codes.
208
Already Reported
The members of a DAV binding have already been enumerated in a preceding part of the response.
226
IM Used
The server has fulfilled a request for the resource, and the response is a representation of the result of one or more instance-manipulations applied to the current instance.
300
Multiple Choices
Indicates multiple options for the resource from which the client may choose.
301
Moved Permanently
This and all future requests should be directed to the given URI.
302
Found
Tells the client to look at (browse to) another URL. The HTTP/1.0 specification required the client to perform a temporary redirect.
303
See Other
The response to the request can be found under another URI using the GET method.
304
Not Modified
Indicates that the resource has not been modified since the version specified by the request headers.
307
Temporary Redirect
In this case, the request should be repeated with another URI; however, future requests should still use the original URI.
308
Permanent Redirect
The request and all future requests should be repeated using another URI.
400
Bad Request
The server cannot or will not process the request due to an apparent client error.
401
Unauthorized
Authentication is required and has failed or has not yet been provided.
402
Payment Required
Reserved for future use. Some services use it to indicate payment is required.
403
Forbidden
The request contained valid data and was understood by the server, but the server is refusing action.
404
Not Found
The requested resource could not be found but may be available in the future.
405
Method Not Allowed
A request method is not supported for the requested resource.
406
Not Acceptable
The requested resource is capable of generating only content not acceptable according to the Accept headers sent in the request.
407
Proxy Authentication Required
The client must first authenticate itself with the proxy.
408
Request Timeout
The server timed out waiting for the request.
409
Conflict
Indicates that the request could not be processed because of conflict in the current state of the resource.
410
Gone
Indicates that the resource requested was previously in use but is no longer available and will not be available again.
411
Length Required
The request did not specify the length of its content, which is required by the requested resource.
412
Precondition Failed
The server does not meet one of the preconditions that the requester put on the request header fields.
413
Payload Too Large
The request is larger than the server is willing or able to process.
414
URI Too Long
The URI provided was too long for the server to process.
415
Unsupported Media Type
The request entity has a media type which the server or resource does not support.
416
Range Not Satisfiable
The client has asked for a portion of the file, but the server cannot supply that portion.
417
Expectation Failed
The server cannot meet the requirements of the Expect request-header field.
418
I'm a teapot
This code was defined in 1998 as an April Fools joke and is not expected to be implemented by actual HTTP servers.
421
Misdirected Request
The request was directed at a server that is not able to produce a response.
422
Unprocessable Entity
The request was well-formed but was unable to be followed due to semantic errors.
423
Locked
The resource that is being accessed is locked.
424
Failed Dependency
The request failed because it depended on another request and that request failed.
425
Too Early
Indicates that the server is unwilling to risk processing a request that might be replayed.
426
Upgrade Required
The client should switch to a different protocol such as TLS/1.3.
428
Precondition Required
The origin server requires the request to be conditional.
429
Too Many Requests
The user has sent too many requests in a given amount of time (rate limiting).
431
Request Header Fields Too Large
The server is unwilling to process the request because either an individual header field, or all the header fields collectively, are too large.
451
Unavailable For Legal Reasons
A server operator has received a legal demand to deny access to a resource or to a set of resources.
500
Internal Server Error
A generic error message, given when an unexpected condition was encountered and no more specific message is suitable.
501
Not Implemented
The server either does not recognize the request method, or it lacks the ability to fulfil the request.
502
Bad Gateway
The server was acting as a gateway or proxy and received an invalid response from the upstream server.
503
Service Unavailable
The server cannot handle the request (because it is overloaded or down for maintenance).
504
Gateway Timeout
The server was acting as a gateway or proxy and did not receive a timely response from the upstream server.
505
HTTP Version Not Supported
The server does not support the HTTP version used in the request.
506
Variant Also Negotiates
Transparent content negotiation for the request results in a circular reference.
507
Insufficient Storage
The server is unable to store the representation needed to complete the request.
508
Loop Detected
The server detected an infinite loop while processing the request.
510
Not Extended
Further extensions to the request are required for the server to fulfil it.
511
Network Authentication Required
The client needs to authenticate to gain network access.
ツールはブラウザ内で動作します。共有リンクに入力内容が含まれる場合があるため、共有前に URL を確認してください。
使い方
- ステータスコードやキーワードを検索します。
- 説明とレスポンスヘッダー、ログを照合します。
対応する操作の一例です。上のツールでモードと設定を選んでください。生成結果や書式は設定によって異なります。
入力または設定の例
404結果の例
404 Not Found301 と 302 の違いは？
301 は恒久的、302 は一時的なリダイレクトです。Location ヘッダーも確認します。