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Understanding HTTP Status Codes
August 15, 2026
When you visit a website, your browser communicates with the server. The server responds with a 3-digit HTTP Status Code indicating whether the request was successful, failed, or requires further action.
The 5 Categories
- 1xx (Informational): Request received, continuing process.
- 2xx (Success): The action was successfully received, understood, and accepted. (e.g.,
200 OK). - 3xx (Redirection): Further action must be taken to complete the request. (e.g.,
301 Moved Permanently). - 4xx (Client Error): The request contains bad syntax or cannot be fulfilled. (e.g., the infamous
404 Not Found). - 5xx (Server Error): The server failed to fulfill an apparently valid request. (e.g.,
500 Internal Server Error).
If you see a weird error in your network tab (like a 418 I'm a teapot), use our lookup tool to instantly discover what it means and how to fix it!