Complete searchable database of all HTTP status codes from 1xx to 5xx. Find descriptions, meanings, and common causes for every response code.
About HTTP Status Codes
HTTP status codes are three-digit numbers returned by web servers in response to client requests. They indicate whether the request was successful, redirected, encountered an error, or requires additional action. Understanding HTTP status codes is fundamental for web developers, system administrators, SEO specialists, and anyone working with web technologies. This comprehensive reference covers every standard HTTP status code with clear descriptions and common scenarios.
HTTP status codes are grouped into five categories based on their first digit: 1xx (Informational), 2xx (Success), 3xx (Redirection), 4xx (Client Error), and 5xx (Server Error). Each category serves a distinct purpose in the HTTP protocol, and understanding these categories helps you quickly diagnose and resolve web issues.
How to Use This Reference
Search by code: Type any HTTP status code number (like 404 or 500) into the search box to find it instantly.
Search by keyword: Enter descriptive terms like "not found", "timeout", or "redirect" to find related codes.
Filter by category: Click the category tabs to show only 1xx, 2xx, 3xx, 4xx, or 5xx status codes.
Read the description: Each code card shows the code number, official name, and a brief description of when it occurs.
Complete DatabaseAll standard HTTP status codes from 100 to 599 with official names and descriptions.
Instant SearchSearch by code number or keyword to find specific status codes in milliseconds.
Category FilteringFilter by Informational, Success, Redirection, Client Error, or Server Error categories.
Color-Coded DisplayEach category has a distinct color for instant visual identification of code types.
Common ScenariosUnderstand when each status code occurs and what it means for your application.
Developer FriendlyDesigned for quick reference during debugging, API development, and server configuration.
HTTP Status Code Categories Explained
1xx Informational: The request was received and the process is continuing. These codes are rarely seen by end users. Examples include 100 Continue and 101 Switching Protocols.
2xx Success: The request was successfully received, understood, and accepted. The most common is 200 OK, which indicates a successful HTTP request. Other common codes include 201 Created and 204 No Content.
3xx Redirection: Further action is needed to complete the request. These codes direct the client to a different URL. 301 Moved Permanently and 304 Not Modified are among the most frequently encountered.
4xx Client Error: The request contains bad syntax or cannot be fulfilled by the server. 404 Not Found is the most well-known, but 401 Unauthorized and 403 Forbidden are equally important for security.
5xx Server Error: The server failed to fulfill a valid request. 500 Internal Server Error is the generic catch-all, while 502 Bad Gateway and 503 Service Unavailable indicate infrastructure issues.
Use Cases
API DevelopmentChoose the correct status codes for REST and GraphQL API responses.
DebuggingQuickly identify what a status code means when troubleshooting HTTP errors.
SEO AnalysisUnderstand how status codes affect search engine crawling and indexing.
Server ConfigurationConfigure custom error pages and redirect rules based on status code behavior.
Why Choose TooliFyra for HTTP Status Code Reference?
TooliFyra's HTTP Status Codes Reference is the most comprehensive, searchable, and visually organized status code database available online. With instant search, category filtering, color-coded display, and plain-language descriptions, it eliminates the need to dig through RFC documentation. Whether you are building an API, debugging a server issue, or learning web development, this reference gives you the answer in seconds.
Frequently Asked Questions
HTTP 200 OK indicates that the request was successful. The server has processed the request and returned the requested resource. This is the standard success response for GET requests and most API calls.
301 Moved Permanently indicates a permanent URL change and transfers link equity to the new URL. 302 Found is a temporary redirect that does not transfer link equity. For SEO, use 301 for permanent moves and 302 for temporary ones.
A 403 Forbidden error means the server understood the request but refuses to authorize it. This typically occurs due to insufficient permissions, IP restrictions, missing authentication credentials, or directory listing being disabled.
A 502 Bad Gateway occurs when a server acting as a gateway or proxy receives an invalid response from an upstream server. Common causes include the upstream server being down, timeout issues, or incorrect proxy configuration.
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