301 Moved Permanently

3xx Redirection RFC 9110

This URL is gone for good — update your bookmarks.

What 301 Moved Permanently means {#what}

The resource has permanently moved to a new URL, provided in the Location header. Search engines will update their index and transfer link equity to the new URL. Browsers will cache this redirect.

When you’ll see a 301 {#when}

A page or resource that has been permanently relocated
HTTP → HTTPS migration
Domain changes or URL restructuring

When to use 301 {#use}

Use for permanent URL changes
Be careful: browsers cache 301s aggressively — test with 302 first if unsure

Don't confuse 301

302 temporary redirect, not cached 308 same as 301 but preserves the HTTP method (POST stays POST)