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 achieve this by using the redirect URL in the Thank You page of the form and set it back to the form URL itself.
Here is my demo form https://form.jotform.com/51997680068975
If you test submit this form, it will redirect back to itself -- with clear/empty/refreshed fields again.
Hope this help. Let us know if you need further assistance.