Can I download my form so that it can be used offline?

You might want to download the full source code of the form, however, if you need your users to submit the data, then you'll need to get connected to the INTERNET, as the submissions will be sent to our servers.

Another way around could be to make a PDF form, here's a guide that explains this in more detail

http://www.jotform.com/help/212-How-to-Create-a-PDF-Form