This extension will detect all HubSpot forms and expose all hidden fields.
hubspot-form-analyzer is a lightweight extension for Chrome/Chromium that scans your webpages for HubSpot forms and exposes hidden fields when available.
This extension can be helpful when debugging HubSpot forms.
New in V1.1: You can now enable/disable the edit links to go directly to the form in a HubSpot account.