4To3

Easily convert MP4/AAC/M4A files to MP3 format. You can convert a single file, or multiple files at once by selecting a folder as your source. This app does what it claims, no less, and no more. It is absolutely FREE and does not contain ads or in-app purchases. While simple, it sports an elegant UI that won't be an eyesore for your beautiful Windows 10 environment. If you find this app useful please give it a good rating and review. That's all I'm ever gonna ask :)