If you’ve ever needed to convert media on your Mac to various formats you’ve probably accumulated a collection of various applications that serve some functions and not others. Adapter saves you the trouble by letting you convert just about any audio, video, or image file to the format you need. It also has the advantage of being completely free.
The app is designed to be easy, so you can choose presets for quick conversion. If you know what you’re doing, however, you can just click the “Advanced” button (at the bottom right of the window) and get plenty of other options giving you more, but not complete, control. Regardless of any limitations, there are tons of conversion features for all media types. You can even convert a file you haven’t downloaded yet by specifying its URL. If you want a video from YouTube, it’ll take care of downloading that as well. Adapter is just a really comprehensive, really fast conversion app.
For more information on how this program works and to download :http://www.macroplant.com/adapter/