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.
This can happen when you embed your form with full source code option.
The reason for that is because the code is then a direct part of your website and as such it will be affected by the CSS codes of your website itself.
To remove this, you would need to modify all the styles that affect it or add additional styles to look properly.
The easiest way to remove this would be to embed your form with the iframe embed code.
To do that you should check out the following guide: How to get the jotform iFrame Code
Do let us know if you have any further issues embedding the form and we would be happy to assist :)