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 increase the upload size limit on your form, just refer to this guide in order to know how to do it : http://www.jotform.com/help/33-Changing-the-Upload-Size-Limit
Do note, this uploaded files will use the free space in your account, you may get the Almost Out of Space message, if you got it, just delete old submissions or you will need to upgrade your account.
Hope this helps.