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.
This could be tricky as the height is dynamically calculated based on your form's fields.
But you can check the current height of your form by looking to the iframe code.
On the form editor screen, go to Setup & Embed and click on the Embed Form icon.
Then click on the iframe option.
And you should be able to see the current height of your form on the displayed iframe code
Please let us know if you have further questions.