How to change mpeg4 files to MP3 format

Written by jamie lisse
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How to change mpeg4 files to MP3 format
(Ciaran Griffin/Lifesize/Getty Images)

The Mpeg4 file format is a multimedia file type that typically houses both video and audio. If you want to be able to extract the audio for use on its own, you can convert your Mpeg4 files to MP3 files. It doesn't matter if you have video in the Mpeg4 file because converting it to MP3 leaves you with just the audio. All you need to convert from Mpeg4 to MP3 is a multimedia converter program that supports each format.

Skill level:
Moderately Easy



  1. 1

    Visit the Media-Convert website (see Resources) and select your Mpeg4 file in the "File" field. Only one file can be selected for conversion at a time.

  2. 2

    Scroll down the page to the "Output Format" section, and use the second drop-down menu to select MP3 as your output file type.

  3. 3

    Click the "OK" button to start the conversion. It typically takes less than 10 minutes for the conversion to complete and the download link for the new file to appear on the screen. Repeat for any additional Mpeg4 files.


  1. 1

    Download and install the freeware Audacity from the SourceForge website (see Resources). It works with both Windows and Mac OSX.

  2. 2

    Launch Audacity and add your Mpeg4 file by opening the "File" menu and selecting "Import."

  3. 3

    Open the "File" menu again and select "Save As." Choose MP3 in the "File Type" field and click "Save." This converts the Mpeg4 to Mp3. Repeat for any other Mpeg4 files you need to convert.

    Switch Audio File Converter

  1. 1

    Download and install the Switch Audio File Converter from the NCH website (see Resources). There is a free version for both Mac and Windows.

  2. 2

    Launch Switch Audio File Converter, and add all of your Mpeg4 files by clicking the "Add Files" button.

  3. 3

    Click on the pop-out menu by "Output" to select MP3 as your output file type.

  4. 4

    Convert your Mpeg4 files to MP3 by clicking on the "Convert" button.

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