title: Convert PNG to XNB without XNA Studio
body: <p>I'm using MonoGame in Windows Phone 8 game development. As you know MonoGame has no built-in content processing like XNA Studio and now I can't install XNA anymore (it required VS 2010 - my version is 2013).</p>
  
  <p>So how can I convert a PNG image to XNB file without XNA Studio installed?</p>