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M4A to MP3

Convert M4A to MP3 online for free — turn iPhone voice memos, AAC recordings and DRM-free iTunes audio into MP3 files that play everywhere. Choose 96 to 320 kbps, trim, fade and normalise. Runs entirely in your browser, so your recordings are never uploaded.

100% private — everything runs in your browser. Conversion happens on your device; nothing is uploaded.

100% private — runs in your browser

Your browser decodes the audio and an open-source MP3 encoder (LAME, via lamejs) converts it on your device — nothing is uploaded. Works with MP4, MOV, M4A, WebM, MKV, WAV, OGG and more; very long files need plenty of memory, so trim if your browser struggles.

How to convert M4A to MP3

  1. Drop your M4A file in the box.
  2. Choose the MP3 quality and stereo or mono.
  3. Optionally trim, fade or normalise quiet recordings.
  4. Click Convert to MP3, preview it and download.

What you can use it for

  • Share iPhone voice memos with Android and Windows users
  • Use recordings in apps and devices that only accept MP3
  • Convert interviews and lectures for transcription tools
  • Make audio clips for car stereos and older players

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Frequently asked questions

Why convert M4A to MP3?

M4A (AAC audio) sounds great but isn't supported everywhere. MP3 plays on virtually every device, app and car stereo.

Does it work with Apple Music downloads?

Only DRM-free files. Protected Apple Music tracks can't be decoded by any browser tool.

Tip for voice memos

Choose 128 kbps mono and tick Normalise volume — quiet recordings become clearer and files stay small.

Which quality should I choose?

192 kbps sounds excellent for music and keeps files small; 320 kbps is the highest MP3 quality. For podcasts and speech, 96–128 kbps in mono is plenty.

Can I convert just part of the file?

Yes — set a start and end time (minutes:seconds) before converting. Fade in and out smooths the cut edges.

Is there a file size limit?

There's no upload limit because nothing is uploaded, but the whole file is decoded in your browser's memory. Files up to a few hundred MB work well on most computers; for very long recordings, convert in parts.

Is my file uploaded?

No. Decoding and MP3 encoding both happen on your device.