The HTTP 303 See Other status code tells the client that the requested resource is available at a different URI and should be retrieved using a GET request.
? Key Concepts
Used mainly after POST requests
Forces the next request to be GET
Helps prevent duplicate form submissions
Common in web applications and REST APIs
? Syntax / Theory
A 303 response includes a Location header pointing to the new URL. The browser automatically redirects using GET.
? Code Example(s)
? View Code Example
// Express.js example sending HTTP 303 redirect
res.status(303).redirect("/success");
? View Code Example
// PHP example for HTTP 303 See Other
header("Location: /thank-you.php", true, 303);
exit;
? Live Output / Explanation
What Happens?
The browser receives the 303 response and immediately performs a GET request to the URL provided in the Location header.
? Interactive Example
Click the button below to simulate a form submission flow. Watch the console to see how the POST turns into a GET.