This is extremely cool. So basically, you can have an image file on your desktop and then change the extension name, to .mp3, .zip, .rar or whatever and it will change the format and be functional. What does this mean? Well for me, I always have my USB drive on me. But I never put sensitive documents on it for fear of losing it. Now, I can make a zip file with all my doc’s, mask it as a working image file and even if I did lose it no one would know to rename the file to zip and extract the contents. Watch this gif tutorial to see how easy it is to make one of these files.