Complete reference of all standard HTTP status codes with descriptions and examples.
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A comprehensive, searchable reference for all standard HTTP status codes from 1xx Informational to 5xx Server Error. Search by code number or keyword to find the status you need. Each entry includes the numeric code, official name, a plain-English description, and a practical example use case. Filter by category (1xx, 2xx, 3xx, 4xx, 5xx) using the tab bar. Click any code to copy it to your clipboard. An indispensable quick-reference for web developers, API designers, and anyone debugging HTTP issues.
使い方
1Use the search box to find a code by number or name — results update instantly.
2Click a category tab (1xx–5xx) to filter by status class.
3Read the description and example use case for each code.
4Click any status code number to copy it to your clipboard.
5Combine search and tab filter to narrow results.
よくある質問
1xx (Informational): the request was received and processing continues. 2xx (Success): the request was successfully received, understood, and accepted. 3xx (Redirection): further action is needed to complete the request. 4xx (Client Error): the request contains bad syntax or cannot be fulfilled. 5xx (Server Error): the server failed to fulfill a valid request.
301 (Moved Permanently) tells browsers and search engines that the resource has moved to a new URL indefinitely — they should update their records. 302 (Found) is a temporary redirect; clients should continue using the original URL for future requests.
401 (Unauthorized) means the client must authenticate — credentials are missing or invalid. 403 (Forbidden) means the server understood the request but refuses to authorize it — even with valid credentials the user is not permitted.
500 (Internal Server Error) is a generic server-side error, typically caused by an unhandled exception, misconfiguration, or bug in the server application. Check server logs for more specific information.
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