Audio Converter acts like an audio converter app, but it is built into your Google Chrome web browser. It is one of the most useful and easy-to-use audio converters on the market, and it doesn't charge you any money. It doesn't have the typical free offer where it only converts a few of your files before asking for money, it converts all of the files you load and it does it for free. You upload your files into the Audio Converter, and then you pick the output file. If you want a smaller file, then pick a lower quality level. It has advanced options that allow you to tinker with your conversion. More importantly, it also allows batch conversions, which means you can set it to work on your files and then leave it until it is finished.