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M4A AAC
File conversion

Convert M4A to AAC

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Verified by Adam B.· reviewed by FE Editorial ·updated Aug 21, 2026
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Is it possible to convert M4A to AAC?
Yes - M4A converts to AAC.

You can do it right here with our free converter - no sign-up, and your file is deleted right after.

The fastest path is our free converter above or the command ffmpeg -i in.m4a -c copy out.aac, which strips the MP4 container without touching the audio. The one caveat: if your M4A holds ALAC (Apple Lossless) rather than AAC, any conversion to .aac will be lossy.

Also to AAC: CAF · AIF · AIFF

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Tested on macOS, Windows & Linux
Last verified Sep 2026

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Why convert M4A to AAC?

A device or app may only accept a raw .AAC ADTS stream and refuse the MP4 container that .m4a uses. Some streaming and broadcast workflows also require a bare AAC bitstream for muxing or embedding. Outside those specific requirements, most modern players handle .m4a natively, so conversion is rarely necessary.

How to convert M4A to AAC

Apple iTunes / Apple Music FREE

Add your file to the library, go to File > Convert > Create AAC Version, then locate the new file and rename it .aac.

fre:ac FREE

Open your .m4a in fre:ac, select the AAC encoder from the output format menu, and click Convert.

Freemake Audio Converter FREE

Add your .m4a, click the AAC output button, and hit Convert - batch conversion is supported.

Command line - ffmpeg CLI

Run ffmpeg -i in.m4a -c copy out.aac for a lossless stream copy; use -c:a aac -b:a 192k instead if re-encoding is needed.

Programs that convert M4A

Helium Music Manager
Adobe Soundbooth
Agree MP3 to Ringtone Converter
Aimersoft DRM Media Converter for Windows
Any Audio Converter
Apple iTunes for Windows
fre:ac
Free Mp3 Wma Converter

About these formats

.M4A MPEG-4 Audio File

An M4A file is an MPEG-4 audio file - the audio-only version of an MP4, usually containing AAC (lossy) or ALAC (Apple Lossless) audio. It plays natively on Windows 11, macOS, iPhone, and…

Open .M4A details →
.AAC Advanced Audio Coding

An AAC file contains lossy compressed audio encoded with Advanced Audio Coding, the format that replaced MP3 as the default for iTunes, YouTube and digital broadcasting. It plays in VLC,…

Open .AAC details →

Quality & what to watch

  • When the .m4a contains AAC (the common case), a stream-copy conversion is lossless; re-encoding with a GUI tool adds a small additional quality penalty.
  • If the .m4a holds ALAC (Apple Lossless), converting to .aac is always lossy - there is no way to preserve the lossless quality in a raw AAC file.
  • Raw .aac files carry no metadata, cover art, or chapter markers; .m4a preserves all of those.

Frequently asked questions

Does converting M4A to AAC lose quality?
Not if the M4A already contains AAC and you use a stream-copy tool like ffmpeg with -c copy - the audio bytes are moved unchanged. Re-encoding with any GUI tool causes a small additional loss.
Can I just rename .m4a to .aac?
No. .m4a is an MP4 container; .aac is a raw ADTS bitstream. Renaming does not change the file structure and most players that check the actual format will reject it.
What is the difference between .m4a and .aac?
Both can carry AAC audio, but .m4a wraps it in an MP4 container with metadata and cover art support, while .aac is a bare bitstream with no tags or artwork.
Why do most converters finish so fast?
When the M4A already contains AAC, a stream-copy tool only strips the container with no decoding or encoding, so it completes in seconds regardless of file length.