Can I apply for a fiancee visa while in USA on a vwp?

Question

Can I apply for a fiancee visa while in USA on a vwp?

Answer 1

Get married, then apply for the I-130 and I-485 together (worked for me), it helps if you have documented proof of when you entered the country which I did not have coming from Canada. In my opinion it is easier to go back to your country and have your soon to be spouse apply for your fiance visa.  

Answer 2

no. K-1 visa requires the fiance(e) to be in their home country

Answer 3

Absolutely not.  No visa status change can be done if you are in the US under the Visa Waiver Program.