Do I have to use a website?

Hi,

Not necessarily. You can also use your jotform by just using its direct URL.

Example http://www.jotformpro.com/form/42117176991964

If you need to embed your jotform to a website, then you can follow this user guide 

http://www.jotform.com/help/34-Adding-a-Form-to-a-Web-Page

Hope this help. Please inform us if you need further assistance.

Thanks!