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.
You can easily embed your form to your website so that it can be open as a pop-up. All you need to do is to use the Pop up code of your form:
1. Select Embed Form option.
2. Then, click on Pop-up.
Also you can follow this guide: How to Auto-popup a Lightbox Form
Hope this will help. Let us know if you need further assistance.