How to Look Up HTTP Status Codes
Search and understand all HTTP status codes from 1xx to 5xx. Get clear explanations, common use cases, and troubleshooting tips for every response code.
Open HTTP Status Codes →Step-by-Step Guide
Search for a status code
Type the HTTP status code number (like 404 or 502) or a keyword (like "not found" or "timeout") into the search bar. The tool instantly filters the complete list to show matching codes. You can also browse by category: 1xx Informational, 2xx Success, 3xx Redirection, 4xx Client Error, and 5xx Server Error.
Read the detailed explanation
Each status code entry includes the official name, a plain-English description of what it means, when servers return it, and the HTTP specification reference. This goes beyond just the code name — it explains the practical meaning so you can diagnose issues quickly.
Understand common causes and fixes
For error codes (4xx and 5xx), the tool lists typical causes and recommended fixes. For example, a 429 Too Many Requests means you are hitting rate limits and should implement retry logic with exponential backoff. A 503 Service Unavailable usually indicates temporary server overload.
Use the code in your application
Each entry shows how the status code is typically used in REST APIs and web applications. Learn which codes to return from your own API endpoints — return 201 Created after successful resource creation, 204 No Content for successful deletions, and 422 Unprocessable Entity for validation failures.
Try It Now — Free
No signup, no download. Runs entirely in your browser.
Open HTTP Status Codes