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.
We still currently do not have an integration to Squareup. I will also forward this to our developers as a feature request to count you as one of those looking for this feature. Please note that we're unable to guarantee that this will be implemented anytime soon, it will depend on the current workload of the developers.
We will update you on this thread as soon as this integration has been released.
You can also check the list of app integrations that might help you: http://apps.jotform.com/category/payment_processing.
Great news! Square payment integration is now available: https://www.jotform.com/blog/246-Create-JotForm-Payment-Forms-Using-Square