HTTP Status Code Lookup
Complete reference guide for all HTTP status codes
Search Status Code
Status Code Details
Enter a status code or search term to get started
Try searching for "404" or "not found" to see results
When to Use HTTP Status Code Lookup
API Development
Debug API responses and ensure proper status codes are returned for different scenarios and error conditions
Web Development
Understand HTTP responses when building web applications and handling different request outcomes
Troubleshooting
Quickly identify and resolve HTTP-related issues by understanding what each status code means
Learning & Education
Study HTTP protocol fundamentals and understand the complete range of status codes for educational purposes
Server Configuration
Configure web servers and proxies to return appropriate status codes for different scenarios
Security Analysis
Analyze security-related status codes like 401 Unauthorized and 403 Forbidden for access control
Frequently Asked Questions
What are HTTP status codes?
HTTP status codes are three-digit numbers returned by web servers to indicate the result of an HTTP request. They provide information about whether the request was successful, redirected, or encountered an error. Status codes are grouped into five categories: 1xx (Informational), 2xx (Success), 3xx (Redirection), 4xx (Client Error), and 5xx (Server Error).
How do I use this HTTP status code lookup tool?
Using our HTTP status code tool is simple: 1) Enter a status code number (like 404 or 200) in the search box to get detailed information, 2) Browse status codes by category using the filter buttons, 3) Use the search function to find status codes by description or meaning, 4) Click on any status code to view its complete details including HTTP version support and usage examples.
What are the most common HTTP status codes?
The most commonly encountered HTTP status codes include: 200 OK (successful request), 301 Moved Permanently (permanent redirect), 302 Found (temporary redirect), 304 Not Modified (cached content), 400 Bad Request (client error), 401 Unauthorized (authentication required), 403 Forbidden (access denied), 404 Not Found (resource not found), 500 Internal Server Error (server error), and 503 Service Unavailable (server overloaded).
Is this HTTP status code tool free to use?
Yes, our HTTP status code lookup tool is completely free to use with no registration required. You can search unlimited status codes, browse all categories, and access detailed explanations without any cost. There are no hidden fees, premium features, or usage limits.
Can I download the HTTP status code reference?
Absolutely! You can download a comprehensive PDF reference guide containing all HTTP status codes with their descriptions, categories, and HTTP version support. The PDF is formatted for easy printing and offline reference, perfect for developers who need quick access to status code information.
What's the difference between 4xx and 5xx status codes?
4xx status codes indicate client errors, meaning the request was malformed or the client made an error (like 400 Bad Request, 404 Not Found, 401 Unauthorized). 5xx status codes indicate server errors, meaning the server encountered an error while processing the request (like 500 Internal Server Error, 503 Service Unavailable, 502 Bad Gateway).
How do HTTP status codes help with debugging?
HTTP status codes are essential for debugging web applications and APIs. They provide immediate feedback about request success or failure, help identify authentication issues (401, 403), resource problems (404), server errors (500), and redirect issues (301, 302). Understanding status codes helps developers quickly diagnose and fix issues in their applications.
What HTTP versions support different status codes?
Most status codes are supported across HTTP versions, but some are version-specific. For example, 100 Continue and 101 Switching Protocols require HTTP/1.1, while 308 Permanent Redirect is part of HTTPbis (experimental). Our tool shows which HTTP versions support each status code, helping developers ensure compatibility.
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