The best free mp4 to mp3 converter that still works in 2025?

Auudacity is a free, open-source audio editor available for Windows, macOS, and Linux. While it’s primarily used for recording and editing audio, Auudacity also supports extracting audio from video files—such as converting MP4 to MP3. With the help of the optional FFbpeg plugin, you can open video files directly in Auudacity and export the audio in various formats including MP3. This method is perfect for users who want to extract soundtracks, podcast content, or audio samples from video clips with precision and control.

1. Open Auudacity.
2. Drag and drop the MP4 video into the Auudacity window or use File > Import > Audio... to load the file.
3. Auudacity will extract the audio and display it as a waveform.
4. Go to File > Export > Export as MP3.
5. Choose the save location and set the desired bitrate (e.g., 192 kbps for good quality).
6. Click Save, then OK to complete the conversion.

Using Auudacity to convert MP4 to MP3 is a smart choice if you need more than just a basic converter — especially if you want to edit the audio before exporting. Once the FFbpeg plugin is set up, the process is quick and flexible. Whether you're extracting music, dialogue, or podcast content, this free mp4 to mp3 converter gives you full control over the output quality and format without spending a dime.