Domain Aliasing

You can create a domain alias for the 123FormBuilder domain URL, if you are a Professional 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 domain name and no reference to 123FormBuilder. In order to set up a domain alias, you need to create a subdomain on your own domain and to add a new CNAME record to your DNS.

Here are step-by-step instructions on how to create a domain alias and enable it:

  • Create a subdomain on your domain, e.g.
  • Add a new CNAME record to your server DNS. The change normally takes effect in several days.
    For example: CNAME
    (Please copy the line above exactly as it is, with all of the dots. Replace only with your own subdomain.)
  • Go to your 123FormBuilder Get Code & Publish section and tick the checkbox Enabled in the Domain Aliasing subsection at page top.
  • In the domain mapping customization lightbox, type the subdomain that you will use as an alias, the one set up at the previous steps. Press Save.

Domain Aliasing

Domain aliasing is now active. The form URL has been replaced with the alias in all of the publishing options. Copy/paste the form code normally. The domain alias will be used instead of our domain name.Domain Aliasing

An important mention is that after you have configured your CNAME, you should contact one of our Customer Support agents and let them know your new subdomain. They will need to add it in our database in order to make sure that everything will work properly.

Related documentation:
Do domain aliasing and SSL encryption work together?


  1. Bob Andrew says:

    Where is the “Get code & publish” section on 123FormBuilder? I am a Platinum user, and am not finding that on my dashboard or in any of my forms

    • Daira Tabuica says:

      Hello Bob,
      In your account, in My Forms section right next to the Dashboard, when you click Edit on any form you want to publish, the editor opens up and you have 5 sections in the top left corner: Edit, Settings, Publish, Submissions, Reports.
      In the Publish section you can find the code and use it to publish your forms on your web site.
      If you need further assistance on this matter please contact us at

  2. Nerida says:

    My domain aliasing doesn’t seem to be working. It has been over 48 hours. I have triple checked everything, and it is all the same. I set the CNAME record up for and and I have copied the into the Domain Aliasing section of 123 forms. What am I doing wrong?

  3. Naji Boutros says:

    Does it have to be a sub-domain? Couldn’t I purchase a domain name and us that instead?

  4. Javier says:

    If I have a certificate SSL with a custom domain, I gess I can integrate all the security to my forms throuht 123 fomrs.Am I Right?

  5. […] Use your own subdomain as an alias for the domain. Here are instructions on how to set up domain aliasing. Users will access your form builder at this URL and all form management will be done […]

  6. […] you also interested in Domain Aliasing? Related Topics Form LinkEmbed CodeLightboxFacebookBloggerWordPressJoomlaGoogle […]

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