JotForm is a free online form builder which helps you create online forms without writing a single line of code. No sign-up required.
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.
We have a very detailed guide on how to embed your form to a Wix-powered website here https://www.jotform.com/help/70-Adding-a-Form-to-Your-Wix-Site
Once you're done following the guide, ensure you will adjust the size/height of the element to avoid it being cut off, then position it properly on your website. Lastly, make sure to save and publish your changes in Wix afterwards.
Hope that helped!