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 set your form to default state using Form builder. Go to Form builder and click on preferences. In preferences you have Themes option to set your form's theme. Click on it and set it to default.
If you have some custom css you should also delete that from Inject Custom CSS field in Preferences.
That should reset your form to default state.
If you just want to revert your form to previous state you can use our Revision history tool.
Please let me know if this works for you.