HTTP Status Codes Reference Online — Look Up Response Codes
Look up common HTTP status codes and meanings online, including 2xx, 3xx, 4xx and 5xx responses.
About this tool
Enter a supported code for one result or leave input blank to list the built-in reference of common informational, success, redirect, client and server responses.
How to use
- Enter a status code or leave blank.
- Run the lookup.
- Use the result with protocol documentation.
Features
- Common 100–504 responses.
- Single-code or list mode.
- Local lookup.
Common use cases
- Debug API responses.
- Read server logs.
- Learn web protocol meanings.
Common issues and tips
- The reference is intentionally not exhaustive.
- A status meaning does not explain the application-specific cause.
Privacy
Lookup runs locally.
Frequently asked questions
Does it include every HTTP code?
No, it focuses on common codes.
What does 404 mean?
The requested resource was not found.
What does 500 mean?
The server encountered an internal error.