Full Page Screenshot Tool for Trial Sites?

Hello everyone!

I'm wondering if anyone has had success taking a full page screenshot of a trial site. In the past, the Chrome extension GoFullPage has worked great for me. But I'm realizing it doesn't work well on trial sites. 

I'm in the process of creating a template shop and I'd like to grab full page screenshots of my sites for marketing. Does anyone have a toll that takes good full page screenshots on trial sites?

Thank you in advance!

I was having an issue with Go Full Page not working on a trial website but I got it to work.

The solution for me was to open the website whist not logged into Squarespace (a different Chrome profile) and use a password to access the unpublished website. I also made sure to scroll all the way down so the animations/all elements were loaded.

I hope this helps someone else!