308 Permanent Redirect
The HTTP 308 status code means a requested resource has been moved to a different URL once and for all, and from now on, clients should look for this resource in a new location (as indicated in the Location header):
HTTP/2 308 Permanent Redirect
Location: https://example.com/new
308 vs 301
308 is similar to the 301 Moved Permanently status code: the redirect is permanent, and clients should update their links.
The difference is that with 308, clients should reuse the same request method and body that appeared in the original request.
| Request Method | Permanent | Temporary |
|---|---|---|
| Can change from POST to GET | 301 | 302 |
| Can’t change from POST to GET | 308 | 307 |
Browser support
308 Permanent Redirect was introduced in 2014, so ancient browsers don’t support it. If backward compatibility with ancient clients is a consideration, use 301.
Search engines
Search engines treat 308 the same way they do 301s: they pass most, if not all, of the domain authority (aka link juice) to the new URL.