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.
You can use the "Get Referrer" widget to find out where your users came to your form from:
This does not work if your form is embedded using the iFrame code but should do exactly what you need other than in that circumstance.
If you have any further questions, let us know and we will be happy to help.