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.
Yes, you can do that by setting up the form to show Thank you Message and then adding the image over the toolbar.
You can see here how to set up the thank you page: Setting Up the Thank You Page
Now once you in it all you have to do to add the image where you want it is to click where the image should be located at and then click on the Insert Image as mentioned above:
Once you do, there will be a new window that will open:
In the first field you enter the link to the image and under dimensions you can set its size - the original picture size will load for you, but you can also resize the image using the little resize handles when you view the image.