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.
The font size of a form can be changed from the Form Preferences or from the Form Designer.
To change from the Form Preferences, click on Preferences icon on the tool bar and click on Form Styles tab to change the Font Size globally for the particular form.
The font size can also be changed using Base font-size slider from the Form Designer.
Hope this information helps.