Visitors still see a browser warning because your app has no certificate

My app is live, but the address bar says Not Secure and it's still on some random onrender.com address.

Beginner to intermediateRead 5 minDoing: under an hour, most of it waiting on DNS5 steps

What you'll have at the end

Your app answering on your own domain with a trusted certificate and no browser warning

Before you start

You need

An app already live and reachable at your host's own default address, and a domain name you already own through a registrar.

Not covered

Buying a domain name for the first time, and covering every address under it with one wildcard entry.

Leans on

5 steps

Fix the CORS error blocking your React frontend

go there if your frontend's calls to the API start failing with a CORS error once everything answers under the new domain

Checked 25 Aug 2026