Productive ToolboxHTTP Status Code Lookup
Searchable encyclopedia of all HTTP status codes with descriptions, use cases, and examples.
HTTP Status Code Lookup
Instantly search and understand all HTTP status codes. Perfect for developers debugging APIs, building web applications, or learning HTTP fundamentals.
Search HTTP Codes
Common Codes
All HTTP Status Codes
💡 Tips
- • Search by code number (404), name (Not Found), or keywords (redirect, server error)
- • Use category filters to narrow down results by status code type
- • Click on any code to see detailed explanation, use cases, and examples
- • All data is stored locally - works offline once loaded
Complete HTTP Status Code Reference Guide
What are HTTP Status Codes?
HTTP status codes are three-digit numbers returned by web servers to indicate the result of a client's request. They provide essential information about whether a request was successful, encountered an error, or requires additional action. Understanding these codes is crucial for web developers, API engineers, and anyone working with web technologies.
HTTP Status Code Categories
1xx - Informational
Indicates that the request was received and understood. These are interim responses used to inform the client that the initial part of the request has been received.
2xx - Success
Indicates that the client's request was successfully received, understood, and accepted. These are the codes you want to see in your applications.
3xx - Redirection
Indicates that further action needs to be taken by the client to complete the request. Usually involves redirecting to a different URL.
4xx - Client Error
Indicates that the client seems to have made an error. The request contains bad syntax or cannot be fulfilled by the server.
5xx - Server Error
Indicates that the server failed to fulfill an apparently valid request. These errors originate from the server side and are not the client's fault.
Most Common HTTP Status Codes
200 OK
The most common success status. Indicates that the request has succeeded and the server has returned the requested data.
404 Not Found
The most famous error code. Indicates that the server cannot find the requested resource. Often seen when accessing broken links or deleted pages.
500 Internal Server Error
A generic server error indicating that something went wrong on the server side, but the server couldn't be more specific about the error condition.
Why HTTP Status Codes Matter
- •API Development: Proper status codes help clients understand request outcomes
- •SEO: Search engines use status codes to understand page availability
- •Debugging: Status codes provide immediate insight into what went wrong
- •User Experience: Proper error handling improves user satisfaction
- •Monitoring: Status codes help track application health and performance
Best Practices for HTTP Status Codes
- Be Specific: Use the most appropriate status code for each situation
- Consistency: Use the same status codes for similar scenarios across your API
- Documentation: Document which status codes your API returns and when
- Error Messages: Include helpful error messages in the response body
- Testing: Test that your application returns correct status codes
Tool Features
Search & Filter
- • Instant search by code number or keyword
- • Category filtering (1xx-5xx)
- • Fuzzy search across descriptions
Developer Tools
- • Copy code information to clipboard
- • Export detailed code explanations
- • Recent codes history