JotForm is a free online form builder which helps you create online forms without writing a single line of code. No sign-up required.
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.
I'm not sure if I understand you correctly. Would you like to upload the fillable PDF form to JotForm so that it can be used? If that is the case you can import that fillabe PDF form using the Import Tool in FormsCentral here: http://www.jotform.com/adobe-formscentral-alternative/. You can choose the 3rd option:
Or are you looking on how to use JotForm to be embedded on a website or be shared on the internet? If this is the case, you can check our "Embed Form" options found in the form builder. Here's a screenshot that might be of a help.
Do let us know if I missed your point.