how to load PDF file to jotform

If you wish to display PDF files on your form you can use the PDF embedder widget:

http://widgets.jotform.com/widget/pdf_embedder 

If on the other hand you wish to import PDF forms to your Jotform account you can use the PDF only option on our import tool:

https://www.jotform.com/adobe-formscentral-alternative/ 

Please let us know more details so we can be of more assistance.