Why don't I see my form in the Preview mode?

Why don't I see my form in the Preview mode?

Check for the following if you don't see your form in the Preview mode:
  1. If you are unable to view your form in preview mode, it is likely that you have not installed the Tag Assistant Companion browser extension, which is required for your form embedded within an iframe to work reliably in preview mode.

    Install Extension


  2. If it still does not work, you might have not enabled the domain for debugging, which may explain why it is missing from the preview window. If this is the case, GTM will notify you with two alerts, which you can use to enable the domain for debugging.