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Convert.mp3

Convert MP3 to M4A online

100% localFiles never leave your device — no upload, no account, no tracking.
About MP3 to M4A

Convert MP3 files into M4A, the AAC-based format that fits neatly into iTunes, Apple Music, and iOS. Choose a bitrate and we encode locally with ffmpeg.wasm.

The conversion runs entirely in your browser. Your MP3 never leaves your device.

How it works
  1. 01

    Add an MP3

    Drop your MP3 file onto the page or pick it from your device.

  2. 02

    Set bitrate

    Choose the M4A bitrate for the output.

  3. 03

    Convert

    Click Convert to encode an M4A locally with ffmpeg.wasm.

  4. 04

    Download

    Save the M4A file.

Features
apple-friendlyadjustable bitrateefficient codec
Frequently asked
How does the MP3 to M4A converter work?
Convert MP3 files into M4A, the AAC-based format that fits neatly into iTunes, Apple Music, and iOS. Choose a bitrate and we encode locally with ffmpeg.wasm.
Are my files uploaded to a server?
No. Everything runs entirely in your browser using local JavaScript and WebAssembly. Your files never leave your device.
Does it cost anything or require an account?
No. The converter is free, needs no sign-up, and runs locally in your browser.
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