Redirects (3xx)

303 See Other

The server points you to another page, usually after sending a form.

Quick answer

A 303 tells the browser to load a different address with a normal page request. Sites often use it after you submit a form, so reloading does not send the form twice.

When to wait: No waiting needed.

If you are visiting the website

  1. Let the browser follow it This is normal. You should see the next page automatically.
  2. Do not resend forms If you are unsure whether a form was sent, check your email or account before submitting again.

If you run the website

  1. Use it after form posts Redirect with 303 after a successful POST to prevent duplicate submissions.
  2. Do not use it for moved pages For moved content, use 301 or 308.

Likely causes

  • Common A form was submitted and the site shows a confirmation page. (Website side)

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One measurement point. Results explain what we saw, not a worldwide verdict.

Sources

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