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M4A to AAC · Free

Convert M4A to AAC

Turn your M4A file into an AAC that plays where you need it, with nothing to install.

  • Free to start
  • Nothing to install
  • Up to 1GB
How it works

How to convert M4A to AAC

  1. Upload your M4A file

    Drag and drop a M4A file to turn into AAC, or click to browse. Anything under 1GB, and nothing is installed.

  2. Keep AAC selected

    AAC is already selected for your M4A, first in the list. Pick MP3 or WAV instead if you change your mind.

  3. Convert and download

    We convert the M4A on our servers, usually in under a minute. Create a free account to download the AAC.

Why convert M4A to AAC?

M4A is AAC audio in an MP4 container: what an iPhone Voice Memo, GarageBand export or Apple Music download hands you. It sounds better than MP3 at the same bitrate, but the extension confuses older hardware and plenty of upload forms.

The practical problem: Older car stereos, media players and some upload forms reject .m4a. ALAC-encoded M4A files are far larger than people expect.

AAC solves that. Efficient modern codec, standard inside MP4 and streaming.

Container

M4AMPEG-4 audio
AACRaw AAC / ADTS stream

Typical codecs

M4AAAC (lossy) or ALAC (lossless)
AACAAC (lossy)

Best for

M4AVoice memos and Apple audio exports
AACAudio pulled out of video files

Plays on

M4AApple devices natively, most others too
AACMost modern devices; bare streams can confuse players

File size

M4ASlightly smaller than MP3 at the same quality
AACSimilar to MP3, slightly better quality
FAQ

M4A to AAC questions

Is the M4A to AAC converter free?

Yes. Convert and preview the result for free, then create a free account to download it. There is no per-file charge, and nothing is added to the sound of the AAC.

Do I need to install any software?

No. The conversion runs on our servers and you use it from a browser tab, so it works the same on Windows, macOS, Linux, iPhone and Android. Nothing to install at either end. Where M4A plays: Apple devices natively, most others too. Where the AAC you get back plays: Most modern devices; bare streams can confuse players.

Does converting M4A to AAC reduce the quality?

M4A to AAC is a re-encode, so a small amount of detail is lost. At the default quality level the difference is inaudible on speech, and for music it stays well below what typical playback gear reveals.

How large a file can I convert?

Anything under 1GB per upload, which is more footage in some formats than others. M4A: Slightly smaller than MP3 at the same quality. AAC coming back: Similar to MP3, slightly better quality. For anything bigger, trim or compress it first, both are free tools here.

Is my file kept private?

Your upload is processed and then held only as long as your project needs it. Nothing is published, indexed or shared unless you create a share link yourself.

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Convert M4A to AAC now

Free, nothing to install, and the file stays open in a full video editor afterwards.