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.
The first option would be to add the print button to the form, before it is submitted they could click on this button and will get a PDF version of the web form with the entered info.
Here's a guide with details about this: Print-Button-on-Forms
You could also set up an auto-responder on your form and attach the PDF report of submission in it by going to the advanced settings and turning on the PDF attachment option:
Hope this helps.