HTTP Status Codes
Reference for HTTP status codes.
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Look up HTTP status codes and their official specifications quickly. Find status codes using search, runs entirely client-side in your browser.
How to use it
- Type a code, a name or a keyword into the search box.
- Read the meaning of the matching status codes.
- Use the category groupings to find a related code.
Frequently asked questions
What do the code classes mean?
1xx is informational, 2xx is success, 3xx is a redirect, 4xx blames the request and 5xx blames the server.
What is the difference between 401 and 403?
401 means you have not proved who you are, so authentication may still help. 403 means you have, and you still are not allowed in.
Which redirect should I use, 301 or 302?
301 is permanent and passes ranking signals to the new URL. 302 is temporary and keeps the original indexed, so use it only when the move really is temporary.