This tool is a comprehensive HTTP status code reference that fully includes status codes defined by HTTP/1.1 and HTTP/2 protocol standards, as well as extended status codes commonly used by server software such as WebDAV, Nginx, Cloudflare, and Microsoft IIS, helping developers quickly look up information.

What is an HTTP Status Code?

An HTTP status code is a 3-digit numeric code used to indicate the response status of a web server\'s Hypertext Transfer Protocol. It is defined by the RFC 2616 specification and extended by specifications such as RFC 2518, RFC 2817, RFC 2295, RFC 2774, and RFC 4918.

Status Code Categories

• 1xx (Informational Status Codes)：Indicates the server has received the request and is processing it; usually a temporary response.
• 2xx (Success Status Codes)：Indicates the request has been successfully received, understood, and accepted by the server.
• 3xx (Redirection Status Codes)：Indicates the client needs to take further action to complete the request.
• 4xx (Client Error Status Codes)：Indicates an error may have occurred on the client side, hindering the server\'s processing.
• 5xx (Server Error Status Codes)：Indicates an error occurred while the server was processing the request.
• Extended Status Codes：Non-standard status codes defined by server software such as WebDAV, Nginx, Cloudflare, and IIS.

Tool Features

• Comprehensive coverage: Covers standard status codes and extended status codes from WebDAV, Nginx, Cloudflare, etc., totaling over 100.
• Real-time search: Enter status code numbers or English keywords to quickly filter target status codes.
• Category filtering: Quickly locate by 1xx-5xx and extended status code categories.
• Detailed content: Each status code includes standard name, Chinese meaning, application scenario description, and more.
• Responsive layout: Card-based display, adapts to various screen sizes, mobile-friendly.