WebFaz Audio Converter

MP3 to M4A

PT

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MP3 to M4A: convert to AAC in an MP4 container

M4A (AAC audio in MP4) is the preferred format of Apple devices and usually sounds similar to MP3 while taking up less space. Convert your MP3s to M4A at the bitrate you prefer.

Drag one or more audio files here or click to choose

MP3 — one file or several at once

Batch queue⚡ 100% private

How to do it, step by step

  1. Select the MP3 files.
  2. Choose the M4A Bitrate.
  3. Click Convert all.
  4. Download the M4As.

See where to click, with an image of the tool →

When this is useful

Apple devices and apps

M4A is native on iPhone, iPad and Music.

Slightly smaller files

AAC usually keeps similar quality at lower bitrates than MP3.

Tips for a good result

  • Use 192k or more so as not to add losses to the compression already done in the MP3.
  • If the destination accepts MP3, there is no need to convert.

What this tool does not do

  • Converting from MP3 (lossy) to AAC (lossy) does not improve quality and may reduce it a little.
  • The app does not create ringtones or edit the file’s tags.
  • The new file carries the “WebFaz.com” credit in the metadata (comment and artist).

Frequently asked questions

Is M4A better than MP3?
In general it compresses slightly better, but the switch is only worth it if your device or program asks for M4A.
Can I trim a clip while converting?
Yes, turn on Trim clip and enter start and end as hh:mm:ss.

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Text written by Marcelo Amantino · updated October 18, 2026 · who we are