HTTP Status Codes
A quick reference cheat sheet for standard HTTP response status codes and their meanings.
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1xx (Informational)
Switching Protocols
1xx (Informational)
OK
2xx (Successful)
Created
2xx (Successful)
Accepted
2xx (Successful)
No Content
2xx (Successful)
Moved Permanently
3xx (Redirection)
Found
3xx (Redirection)
Not Modified
3xx (Redirection)
Bad Request
4xx (Client Error)
Unauthorized
4xx (Client Error)
Forbidden
4xx (Client Error)
Not Found
4xx (Client Error)
Method Not Allowed
4xx (Client Error)
Conflict
4xx (Client Error)
Unprocessable Entity
4xx (Client Error)
Too Many Requests
4xx (Client Error)
Internal Server Error
5xx (Server Error)
Bad Gateway
5xx (Server Error)
Service Unavailable
5xx (Server Error)
Gateway Timeout
5xx (Server Error)
What is this tool?
A comprehensive, searchable reference guide and cheat sheet for all standard HTTP status codes (1xx, 2xx, 3xx, 4xx, 5xx) with official RFC definitions, categories, and color-coded status badges.
How to use the HTTP status code guide
- Type any status code number (e.g., '404', '500', '200') or keyword (e.g., 'Not Found', 'Unauthorized') into the search box.
- The list filters in real time to show matching status codes.
- Review the color-coded class badges (Informational, Successful, Redirection, Client Error, Server Error).
- Inspect the name, class, and standard meaning for troubleshooting web requests and APIs.
Key Features
- Complete coverage of standard RFC HTTP response status codes
- Instant real-time search by code number, title, or status class
- Color-coded visual status indicators (Green for 2xx, Yellow for 3xx, Orange for 4xx, Red for 5xx)
- Fast, responsive layout optimized for desktop and mobile quick reference
Frequently Asked Questions
What is the difference between 4xx and 5xx HTTP status codes?
4xx codes indicate client-side errors (such as 400 Bad Request or 404 Not Found), meaning the issue originated with the request itself. 5xx codes indicate server-side errors (such as 500 Internal Server Error or 502 Bad Gateway), meaning the server failed to fulfill an otherwise valid request.
Does this tool test live URLs?
This tool is a quick reference guide. To test live HTTP requests and inspect real-time response headers and status codes, use our API Client tool.
Privacy First
This reference tool operates completely offline and statically inside your browser. No queries or search terms are tracked or sent to any server.