303See Other
Go and fetch this other URL with a GET, whatever method you used for the request that got you here.
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The fix for the double-submit problem. After a form POST succeeds, answering 303 sends the browser to a result page with a GET. The address bar now shows a plain URL, so refreshing reloads the result rather than submitting the form again.
This pattern is common enough to have a name, post-redirect-get, and 303 is the code that implements it correctly.
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Status codes
69 of 69 codes. Click a row to copy it.
1xx Informational (4)
2xx Success (10)
3xx Redirection (8)
4xx Client errors (31)
5xx Server errors (16)