What it means
The resource has moved permanently to the URL in Location. Clients and search engines should use the new URL from now on.
Common causes
- A site moved to a new domain or to HTTPS
- URLs were restructured
- www and non-www were consolidated
How to fix it
As a client or visitor
Follow the redirect and update stored links or bookmarks. If you see a loop, clear the browser cache: browsers cache 301 aggressively.
As the site or API owner
Redirect each old URL to its exact new equivalent, not to the home page. Use 308 if POST requests must keep their method and body.
Example response
HTTP/1.1
HTTP/1.1 301 Moved Permanently
Date: Tue, 07 Oct 2025 09:30:00 GMT
Server: nginx
Location: https://www.example.com/new-path
Content-Length: 0Specification
FAQ
› Does a 301 pass SEO value?
Yes. Search engines transfer ranking signals to the target and replace the old URL in results over time.
› Why does my browser keep redirecting after I removed a 301?
Browsers cache permanent redirects. Clear the cache or test in a private window; use 302 while testing.