Your SITE123 account must be on a paid plan in order to embed custom iframe codes.
To add your forms to your SITE123 website:
- Copy your form’s Iframe embed code from the Publish page of your form builder.
- Log in to Site123 and select Add New Page.
- Select the App Market tab, then select the Custom Iframe widget.
- Paste your form’s Iframe embed code into the site builder.
- Publish your changes.