Custom domains let you share your files with a URL like example.com/a1b2. This can be tricky to set up, and is only recommended for advanced users.
If you're uncomfortable with any of the instructions ask a friend who's done this before.
First, you'll need to buy a domain from a registrar. This usually costs $10-$40 per year. Then you'll need to follow the registrar's instructions to point the domain to our servers.
For a sub-domain like www.example.com or cloud.example.com you need to create a CNAME record and point it to:
Using an apex domain like example.com is not recommended. If our IP addresses were to change, you would need to manually update your DNS records. Using a subdomain with a CNAME means that we can make this change for you. Should you absolutely want to use an apex domain, you must use A records pointing them to the following three IPs:
188.8.131.52 184.108.40.206 220.127.116.11
Once you've done this, you may need to wait up to 72 hours for the change to take effect. If the domain is set up properly, you should see the following message when opening it in a browser:
Heroku | No such app
If you have verified that your domain is configured properly you can visit your account page and enter your custom domain (e.g., example.com or cloud.example.com). Click Update, and if everything went right, you should be able to share files with your own domain.
Should you want to return to using the CloudApp URL (cl.ly) simply remove your custom domain from your account page and click Update.