Custom domains

Every app gets a canonical <slug>.cloudrizz.app URL for free. Attach your own domain with the add_domain tool — it returns the exact DNS records to add, and SSL is issued automatically once they resolve.

Adding a domain

Ask your assistant to add the domain, or call add_domain directly. It returns the precise DNS record(s) for the option you pick — copy them into your DNS provider. Certificates are provisioned for you; there's nothing to upload.

If your DNS is on Cloudflare, set the new record to DNS only (grey cloud) — add_domain notes this in the instructions it returns.

The options

1 · www (recommended). Works on any DNS provider:

www.example.com   CNAME   <slug>.cloudrizz.app

2 · Apex (root domain). A bare apex like example.com can’t be a CNAME to the app, so the app is served on www and the apex 301-redirects to it. Point the apex at the free redirector and add the www record — this is what add_domain returns for an apex on any DNS provider (including Cloudflare):

example.com   A      163.172.15.33
example.com   AAAA   2001:bc8:711:6a0d:dc00:1ff:fe31:5fe9
www.example.com   CNAME   <slug>.cloudrizz.app

The apex 301-redirects to www (path preserved); add_domain returns these exact records for your domain.

3 · Subdomain. Any subdomain you like:

app.example.com   CNAME   <slug>.cloudrizz.app

After it resolves

  • SSL is issued automatically — no action needed.
  • Your app is reachable on the custom domain alongside its .cloudrizz.app URL.
  • The custom domain becomes the canonical origin for SEO (canonical tags, sitemap URLs).

The number of custom domains you can attach depends on your plan — see Limits & quotas.