JotForm is a free online form builder which helps you create online forms without writing a single line of code. No sign-up required.
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.
If you are pertaining to our widgets(Jotform), you can add custom CSS to the widgets through its Custom CSS tab.
If, in any case, I have misunderstood you, kindly give us more information about your concern so we can better assist you. May we also know what particular 3rd party widgets are you referring to, please?