Is it possible to protect a form by using Facebook to make users login?

Is it possible to protect a form by using Facebook / Google / LinkedIn etc to make users login.

Unfortunately, we don't have that kind of function here in JotForm. We don't have a widget or app that will allow you to login your Facebook/Google account to authenticate in viewing the form.

You might want to check this guide: https://www.jotform.com/help/278-How-to-Integrate-Your-Form-with-Facebook-Fit-Forms.

If you want to protect your form, this thread might helpful for you: https://www.jotform.com/answers/937885#938093.

If you have any questions, let us know. Thank you.