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.
I understand that you want to make the image responsive on your JotForm. Please try injecting the following CSS code to your JotForm:
Hope this information helps! If you are referring to something different or need any further assistance, please let us know. We will be happy to assist.