3GP is a container format developed for mobile phones. It can contain both audio and video data, like MP4.

Free M4a to MP3 Converter will convert 3GP to MP3 only if the former contains no video. You can play 3GP files to see if they are supported by the program.

Convert 3GP to MP3

As usual, take a look at the “Quick Start” section to see how the files can be converted, or simply drag and drop 3GP audio from your favorite file manager and hit F5 (or click “Convert” on the toolbar). Set a custom folder for saving converted files, adjust MP3 parameters, if needed.