Flounder allows you to add a custom domains to your page, for example, I use alexwennerberg.com as an alias for alex.flounder.online. You can go to either page and see my Flounder site: both on Gemini, and on HTTP.
In order to do this, you'll first need to purchase a domain from a domain registrar. I use Namecheap, and I don't get paid to tell you this:
Then you need to set up a DNS records:
ALIAS @ mydomain.example myname.flounder.online
If your registrar doesn't support ALIAS records, you can use a CNAME record if you don't use this domain for anything else:
CNAME @ mydomain.example myname.flounder.online
Or an A record:
A @ mydomain.example 18.104.22.168
Note that the A record may cause issues if the Flounder server IP evre changes.
Then, go to
And set your custom domain.
It may take some time for your DNS records to propagate -- this can take as little as a few minutes or as much as 24 hours. Then go to mydomain.example and you should see your Flounder page!
This will work on both HTTP and Gemini.