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.
Do you want to duplicate an existing form which you have in your JotForm account?
You can clone the form and the following guide should help you: https://www.jotform.com/help/27-How-to-clone-an-existing-form-from-your-account
If you want to duplicate a HTML form form external webpage or different JotForm account, the following guide should help you: https://www.jotform.com/help/42-How-to-Clone-an-Existing-Form-from-a-URL
Hope this helps.
Do get back to us if you have any questions.