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.
Thank you for contacting us. You can use the "File Upload" element found on the left side of the form builder. There are 2 ways of using "File Upload" 1. Single Upload and 2. Multiple Upload.
To set permission which file extension should only be uploaded see the image below, You can add a new extension by seperating them by comma ',' and if you want to allow all extensions just remove all and replace it with *