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.
Hi Lucy! Aside from the font style in the Form Designer Tool, you can use Google Fonts. Here's a guide that might help: http://www.jotform.com/help/100-How-to-Use-Google-Fonts-in-your-Form
If you have your own font, you can still use it using the @font-face rule in CSS3, here's a guide that you can refer to: http://www.w3schools.com/cssref/css3_pr_font-face_rule.asp
Let us know if you need more help on this.