UtilNest

M4A to MP3 Converter

Convert Apple Voice Memos, iPhone recordings, Android screen recorder audio, and iTunes AAC/M4A audio tracks to universally compatible MP3 format. 100% private in-browser conversion without file uploads.

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Your files never leave your device. All processing happens on your device. No uploads, ever.

How to use M4A to MP3 Converter

  1. 1

    Choose your M4A or AAC file

    Click to upload or drag and drop your .m4a voice memo or audio file.

  2. 2

    Select MP3 quality

    Pick your desired bitrate (128 kbps recommended for voice, 192+ kbps for music).

  3. 3

    Convert and Download

    Click Convert to MP3 and download your converted file immediately.

Convert iPhone Voice Memos to MP3

By default, Apple's Voice Memos app on iPhone, iPad, and Mac saves audio files in MPEG-4 Audio (.m4a) format encoded with AAC. While high quality, many websites, older media players, and Android devices struggle with M4A files. Our free converter transforms your M4A voice memos into universal MP3 files in seconds.

Preserve Clear Audio Quality

Choose your preferred MP3 bitrate from 64 kbps (compact voice notes) to 320 kbps (studio-grade quality). The audio engine decodes your audio with precision and re-encodes it cleanly without introducing distortion.

Private, Secure & In-Browser

UtilNest never uploads your recordings to any remote server. Everything is decoded and encoded strictly within your web browser using modern Web Audio APIs and client-side LAME encoder.

Examples

iPhone Voice Memo to MP3

Input
interview_recording.m4a (M4A AAC)
Output
interview_recording.mp3 (192 kbps MP3)

Screen Recorder Audio to MP3

Input
screen_record.m4a (3.5 MB)
Output
screen_record.mp3 (Compatible everywhere)

Frequently asked questions

How do I convert an iPhone voice memo (.m4a) to MP3?

Share or save the voice memo to your device files, select or drag the .m4a file into this tool, choose your bitrate, and click 'Convert to MP3'.

Is there any file size limit for M4A conversion?

Because conversion happens on your device using your browser's processing power, there are no strict artificial file size caps or daily conversion limits.

Does it support AAC audio files?

Yes, AAC audio streams inside .m4a, .aac, and .mp4 containers are fully supported.

Category: Audio

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Last updated 20 August 2026