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HTTP Status Code
303 See Other
RedirectionThe server tells the client to fetch another resource using a GET request.
HTTP status code reference, response example, common causes, fixes, and related status codes.
What does HTTP 303 See Other mean?
HTTP 303 See Other is a status code sent by a server to indicate the result of an HTTP request.
Status codes help browsers, APIs, apps, and backend systems understand whether a request succeeded, failed, was redirected, or needs additional action.
In practice, HTTP 303 See Other usually appears when a server responds under specific request, validation, permission, or infrastructure conditions.
Response example
HTTP/1.1 303 See Other Location: /success
HTTP example
HTTP/1.1 303 See Other
Relevant headers
Location
Location: /success
Common causes
- Redirect after form submission
- POST-redirect-GET pattern
How to fix it
- Use 303 when redirecting users to a result page after POST
- Ensure the Location header is valid
Common mistakes
- Assuming the status code alone explains the full backend issue
- Ignoring related response headers that add important context
- Treating temporary errors as permanent failures
- Retrying too aggressively without checking the cause
- Debugging the frontend only when the problem is server-side
How browsers and APIs use it
Browsers, APIs, and backend services use HTTP status codes to understand the outcome of a request. Depending on the status code, an application may render content, retry a request, redirect the user, show an error, or trigger a different flow in the client or server.
Developer note
HTTP 303 is great after a POST request when you want the browser to load a confirmation page with GET.