itunes will do it, I found the convoluted instructions with a google search, but I like to do all my conversion and tagging/etc outside itunes before adding to my library. I use the program dbPoweramp. it can covert anything to anything (actually it won't do .caf
but anything else you can think of), and it works easy in the windows context menu. it replaced Trader's Little Helper in my workflow. I paid for it, but there's a month free trial.