What it means
The client should fetch the result at a different URL using GET. Redirection responses tell the client to request a different URL.
Common causes
Redirect after a form POST (post/redirect/get).
How to fix it
Nothing to fix; it is the standard pattern after form submissions.
If you are a visitor
Nothing is wrong. Your browser handles this response automatically.
If you own the site
Browsers follow redirects automatically, up to a limit. Check for loops. Permanent redirects (301, 308) pass ranking signals to the new URL. Temporary ones (302, 307) tell search engines to keep the old URL. Long chains and loops waste crawl budget. Run the HTTP status checker to see exactly what your URL returns, and use uptime monitoring to be told when it changes.
Frequently asked questions
What does HTTP 303 mean?
See Other: The client should fetch the result at a different URL using GET.
Is HTTP 303 an error?
No. Redirection responses tell the client to request a different URL.
Does HTTP 303 affect SEO?
Permanent redirects (301, 308) pass ranking signals to the new URL. Temporary ones (302, 307) tell search engines to keep the old URL. Long chains and loops waste crawl budget.
Should I retry after HTTP 303?
Browsers follow redirects automatically, up to a limit. Check for loops.