Uwarp

First run downloads FFmpeg (~25 MB) once in this browser. Audio extraction runs locally — no server upload. Need MP3 instead? Try /mp4-to-mp3.

Help Us Improve

—

(—)

MP4 to M4A converter online free

Convert MP4 to M4A online free. Free MP4 to M4A converter — extract video audio to AAC .m4a with selectable bitrate, no server upload.

What is an MP4 to M4A converter?

An MP4 to M4A converter (also searched as convert MP4 to M4A or MP4 to M4A converter) extracts the audio track from an MP4 video and saves it as M4A (AAC). Use it when you want Apple-friendly audio without the video stream. This free tool runs locally with FFmpeg WebAssembly — no server upload.

MP4 to M4A converter features

Free online MP4 to M4A audio extractor in the browser.

  • Convert MP4 to M4A online

    Upload an MP4 and download AAC audio as .m4a.

  • MP4 to M4A converter

    Turn video soundtracks into portable M4A for phones and players.

  • Selectable AAC bitrate

    Choose 96 to 320 kbps depending on quality and file size needs.

  • No server upload

    Conversion runs locally with FFmpeg WebAssembly for privacy.

  • Apple-friendly M4A

    Output works well with iPhone, Mac, and many music apps.

  • Simple download flow

    Download the converted M4A as soon as processing finishes.

How to convert MP4 to M4A

How to convert MP4 to M4A or extract M4A audio from MP4 online.

  1. Upload MP4 video

    Drop your .mp4 file (up to 200 MB).

  2. Choose AAC bitrate

    Pick 128 kbps for balance or 192/320 kbps for higher audio quality.

  3. Convert and download

    Click Convert to M4A, then save the .m4a file.

Great for

Common MP4 to M4A and M4A vs MP4 audio scenarios.

  • iPhone and Mac listening

    Extract M4A audio that plays smoothly on Apple devices.

  • Soundtrack extraction

    Save music or voice from MP4 videos without keeping the video track.

  • Podcast and voice clips

    Convert spoken video to M4A for audio-only publishing.

  • Smaller audio sharing

    Share M4A instead of sending a full MP4 file.

Frequently Asked Questions

Quick answers about this tool—open a question to read more.