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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You need to use the "Text" tool under Form Tools. After that, double click the field in order to edit it. Here you can fully customize it by inserting links or images. You just need to do a right click and then paste or use the ctrl+v function in the keyboard.
Hope that helps. Thank you.