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.
Add third party source code to formAsked by Ebeth1233 on November 15, 2016 at 05:51 PM
I assume you meant you want to customize the form with your own custom code. You can do that by using the form's full source code.
User guide: How-to-get-the-Full-Source-Code-of-your-Form
Let us know if you have further question.