5 formats support.
Listen to music using built-in player.
ID3-tag support.
Multiple files conversion.
Professional quality.
User friendly interface.
Absolutely free.

User-Friendly Interface

Free M4a to MP3 Converter was designed to be intuitive, so you don't need to search for some specific option in menus and help. It makes converting audio very easy and fast.

Besides, its interface is multilingual and supports 11 languages.