HTTP Status Codes
Reference for HTTP status codes and their meanings.
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What it does
A quick reference for the HTTP status codes you run into most, grouped into informational, success, redirection, client error, and server error. Each entry shows the code, its standard name, and a one-line explanation.
Type in the search box to filter by number, name, or description, so typing 40 narrows the list to 4xx codes, and typing timeout finds both 408 and 504. Codes are color-coded by class, which makes it easy to tell a redirect from an error at a glance.
When you would reach for it
- Decide between 401 and 403, or 400 and 422, when designing an API error response.
- Look up an unfamiliar code from a log or monitoring alert to see what it means.
- Choose the right redirect code, such as 301, 302, 307 or 308, when moving a page or endpoint.
- Check what 502 versus 504 tells you while debugging a proxy or load balancer.
Also found by searching
- http
- status
- code
- response
- error
- 200
- 404
- 500