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.
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I just moved your 2nd question to a new thread since this doesn't relate to your original question. You can find my response below.
Try it with the default script embed code, I think this should work just fine on Concrete 5 platform.
However, if not, iframe embed code is the best alternative one.
Let us know if you have further questions. Regards!