There are already quite a few free and commercial applications that would allow you to convert 3D photos from the MPO format to something more common and usable such as a 2D view of the photo (left frame) or a JPEG stereo pair in a Side by Side configuration. Sometimes however you may not have any of these handy and you might need to get a 2D frame or a JPS version of a 3D photo taken in MPO format and something else might help you do the job. There is a free online tool that allows you to convert a MPO 3D photo into a separate Left and Right frames as well as to make a JPS Side by Side stereo pair of the 3D photo. The website works quite well, although it may have some trouble with larger MPO files and sometimes the JPS photo turns out to be completely blank, instead of what it should contain. Other than that it does a pretty good job most of the time.