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.
JotForm Support Manager
You can do that, simply grab the iframe code from the builder and change the height in px or % before to embed it in your webpage. If this do not work for you, please share the page where you have embedded your form so we can inspect further and advise.