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.
At JotForm, we want to make sure that you’re getting the online form builder help that you need. Our friendly customer support team is available 24/7.
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.
You can adjust to expand the form to your full page width by inject this Custom CSS Code:
Click "Setup & Embed" tab > Preferences button > "Form Styles" tab
You may use this code as shown above:
Please read on How to Inject Custom CSS codes.
If you need further assistance, please do not hesitate to ask. Thank you