303 See Other — Causes & Fix
HTTP 303 (See Other) means the response to the request can be found at another URL, and the client should retrieve it with a GET request.
- Applies to
- Any website or web server (HTTP standard)
- Time to fix
- 5–30 minutes
What it means
Commonly returned after a POST (form submit) to send the browser to a result page with GET, following the Post/Redirect/Get pattern. HTTP status 303 is defined in RFC 9110 (HTTP Semantics). This is a redirection (3xx) status — the client needs to take an additional step to complete the request.
Symptoms
- After submitting a form, the browser is redirected with GET
- Prevents duplicate form re-submission
How to fix it
- 1
Point to the result page
1. Ensure the 303 redirects to the correct result/confirmation URL.
- 2
Verify the method switch
1. Confirm the follow-up request uses GET (that is the purpose of 303).
Frequently asked questions
Why use 303 after a form submit?
It implements Post/Redirect/Get — after a POST, redirecting with 303 to a GET page stops the browser re-submitting the form on refresh.
Last updated July 20, 2026
Guidance only — always consult a qualified professional or the official service manual before carrying out repairs.