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M4A to MP3 Converter

Turn Apple M4A and AAC audio into MP3 that plays on anything.

Converters Reviews Free · no sign-up

Drop an M4A here, or click to choose one

Converted on your device — the file is never uploaded

Result

Quick Tool Overview

The M4A to MP3 Converter turns Apple’s AAC audio — voice memos, music, audiobooks — into MP3 that plays on anything, with bitrate, trimming and loudness options.

What it does
Converts M4A and AAC audio to MP3
You give it
An M4A, AAC, M4B or M4R file
You get back
An MP3 every device plays
Best for
Car stereos and older players
Converters Free, unlimited use No sign-up Runs in your browser

About the M4A to MP3 Converter

M4A is what an iPhone voice memo saves as, what Apple Music downloads are, and what plenty of audiobooks use. It is a good format. It is also the one that a car stereo from 2012, a cheap MP3 player, an office phone system or an old CMS will refuse to touch.

The conversion runs in your browser through ffmpeg.wasm — the real ffmpeg, compiled to WebAssembly. Nothing is uploaded: a wedding video, a client recording or an unreleased track never leaves your machine. The engine is a one-off download of about 32 MB, after which your browser caches it and every later conversion starts immediately.

Choose the bitrate, resample, force mono for speech, trim a section or even out the loudness. Because M4A is already lossy, this is a re-encode and a little quality goes with it — staying at 192 kb/s or above keeps that inaudible for almost every listener, and the page says plainly when you are asking for more bitrate than the source holds.

Key features of the M4A to MP3 Converter

Voice memos included

iPhone recordings convert directly.

Audiobook chapters

M4B files are read the same way.

Speech settings

Mono at 96 kb/s keeps a voice note tiny.

Trim as you convert

Give a start time and a length to take just the part you need.

Nothing is uploaded

ffmpeg runs inside the browser tab, so the file never leaves your computer.

How to use the M4A to MP3 Converter

  1. 1

    Drop the M4A in

    AAC, M4B audiobooks and M4R ringtones too.

  2. 2

    Pick the bitrate

    192 kb/s for music, 96 for a voice memo.

  3. 3

    Trim or normalise if useful

    A start time, a length, and loudness levelling.

  4. 4

    Convert and download

    An MP3 everything will play.

Frequently asked questions

A little — both formats are lossy, so this is a second encode. At 192 kb/s or above the difference is inaudible to almost everyone.

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