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.
If you want to show or hide a field or a link to a file depending of an answer, you will have to do it with conditions, follow these steps to show fileds and files.
1.Add the field you want to show and add the link to the file, to add the link to the file, you can do it as the image below :
Now, click on Edit HTML button and click on the Hyperlink icon, paste there the link to the file :
2. Now your conditions should look like these :
You can take a look to my sample form here , also you can clone it if you want :
Hope that helps.
Let us know if you need further assistance, we will be glad to help you.