What is JotForm?
JotForm is a free online form builder which helps you create online forms without writing a single line of code. No sign-up required.
At JotForm, we want to make sure that you’re getting the online form builder help that you need. Our friendly customer support team is available 24/7.
We believe that if one user has a question, there could be more users who may have the same question. This is why many of our support forum threads are public and available to be searched and viewed. If you’d like help immediately, feel free to search for a similar question, or submit your question or concern.
It's possible to do with JotForm, you just need to add our Preview Before Answer button and it's done, the user will be able to preview the data before to hit the submit button, refer to the image below in order to add the widget to your form :
You will find further info about it and a sample form on this link :
Hope that helps.
Let us know if you need further assistance, we will be glad to assist you.