You can create a domain alias for the 123 Form Builder domain URL if you are a Platinum user or higher. It’s commonly referred to as domain aliasing (or domain mapping). This way, the form link you share with users will contain your own custom domain and no reference to 123 Form Builder.
In order to set up a domain alias, you first need to create a subdomain on your own domain. Then you will need to add new CNAME records to your DNS.
Once you set up your subdomain, all you need to do is to contact us and specify which subdomain you would like to use on your forms. (e.g forms.yourdomain.com).
After the procedure is done on our end, you will receive two CNAME records (one for the subdomain, and another one representing an SSL certificate). Set up your subdomain to point to the two CNAME records in order to establish the connection.
Finally, go to your form’s Publish → Link → Options section, tick on Use your domain, and enter the subdomain.
The subdomain is now active. The form URL has been replaced with the domain alias in all of the publishing options and it is secured. Copy/paste the form code normally. Your subdomain will be used instead of our domain name from now on.