Are your forms optimized for mobile?

I cannot see that these forms work on  mobile websites?

Our forms are mobile responsive, but it might happen that by using certain field types/widgets a specific form needs further editing in order to become fully responsive.

You can see our guide on how to make a form responsive:

http://www.jotform.com/help/311-How-to-make-Forms-Mobile-Responsive 

And in addition we have a widget to make forms responsive:

http://widgets.jotform.com/widget/mobile_responsive 

It is advisable to use only one of these options, else they might conflict with each other.

If the form is embed in a website please let us know the url so we can investigate it further. Also please provide more details on which browsers are you using and why the form is not responsive (which fields,...).

Let us know if we can assist you further.