Here’s how you can add web forms to your iWeb webpages:
Now, access the editor of your website’s page where you want to add your web form. Look for the tab Widgets in the toolbar on the right side of the page.
Select HTML Snippet and drag it on the page. Double-click it to open its editor and paste the embed code there. Hit Apply and exit the lightbox by pressing x.
If your version accepts the code, the form will be automatically displayed on the webpage in the editor. If not, you can first check if it’s visible when published (locally or on a server) or use one of the other remaining options. You might need to resize the widget so that the entire web form is visible. Once you are finished, publish your site and you can start receiving form submissions from your iWeb website. All submissions will be stored in your 123FormBuilder account, in the Submissions section of your form.