Taken from PC World Magazine, December 2011 Edition

So you have a file that a colleague sent you, and you don’t know to open it. The person who sent it to you doesn’t seem to know either, and your deadline is ticking nearer. What to do? Head to www.go2convert.com

Go2Convert is a handle little site that’s not much to look at, but it serves an incredibly useful function: file conversion. Simply upload the mystery file – it can be in practically any conceivable format – and the site will let you convert it into something that you can use. The site handles more than 100 different file formats, including ancient ones like PostScript and PhotoCD, and somewhat exotic ones such as EXR and DPX. Once you have selected a file from your hard drive and uploaded it, Go2Convert will identify the file format and present you with a drop-down menu of compatible formats to which you can have the file saved. Choose one, select a file quality (if applicable), and then click Convert Now. Once the site has finished the conversion (the process usually takes only a few seconds), the output file will appear below the input area of the screen. Then you just click Download to save the converted file to your PC.