The beauty of using 4Musics WMA to MP3 Converter is that it works from the right click menu on a file. You do not have to invoke a whole other program to to convert WMA to MP3 Simply right click on the MP3, select "Convert to MP3"! As easy as 1, 2, 3! What is a WMA? The WMA (Windows Media Audio) format is an audio format developed by Microsoft. WMA is designed to handle all types of audio content. The files can be highly compressed and can be delivered as a continuous flow of data (on-line radio). WMA files can be of any size, and be compressed to match