Will it work offline?

Do you mean to ask that the JotForm work offline? If so, JotForm is built to create online forms that requires an internet connection to fill the forms. However, you may create fillable PDF free forms to send them to your users to fill and send it offline. However, the infomration filled in PDF forms and sent as an attachment cannot be stored in your account unless it is submitted while having an active internet connection. 

Please refer to the guide below that can help you know more about fillable PDF forms.

http://www.jotform.com/help/312-Fillable-PDF-Everything-you-need-to-know-about-JotFrom-fillable-PDF-creator

Hope this information helps. If you are referring to something different, please let us know. We will be happy to help.

Thanks!