AAC to M4A · Free

Convert AAC to M4A

Turn your AAC file into an M4A 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 AAC to M4A

Upload your AAC file
Drag and drop an AAC file to turn into M4A, or click to browse. Anything under 1GB, and nothing is installed.
Keep M4A selected
M4A is already selected for your AAC, first in the list. Pick MP3 or WAV instead if you change your mind.
Convert and download
We convert the AAC on our servers, usually in under a minute. Create a free account to download the M4A.

Why convert AAC to M4A?

AAC is the codec inside almost every MP4. As a bare .aac stream it lacks the container metadata players rely on, which is why seeking and duration often misbehave until it is wrapped or converted.

The practical problem: Raw AAC streams frequently show the wrong duration or refuse to seek. Fewer players and podcast hosts accept a bare .aac file than an MP3.

M4A solves that. Better quality than MP3 at the same bitrate, and native on Apple devices.

Container

AACRaw AAC / ADTS stream

M4AMPEG-4 audio

Typical codecs

AACAAC (lossy)

M4AAAC (lossy) or ALAC (lossless)

Best for

AACAudio pulled out of video files

M4AVoice memos and Apple audio exports

Plays on

AACMost modern devices; bare streams can confuse players

M4AApple devices natively, most others too

File size

AACSimilar to MP3, slightly better quality

M4ASlightly smaller than MP3 at the same quality

Feature	AAC	M4A
Container	Raw AAC / ADTS stream	MPEG-4 audio
Typical codecs	AAC (lossy)	AAC (lossy) or ALAC (lossless)
Best for	Audio pulled out of video files	Voice memos and Apple audio exports
Plays on	Most modern devices; bare streams can confuse players	Apple devices natively, most others too
File size	Similar to MP3, slightly better quality	Slightly smaller than MP3 at the same quality

FAQ

AAC to M4A questions

Is the AAC to M4A 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 M4A.

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 AAC plays: Most modern devices; bare streams can confuse players. Where the M4A you get back plays: Apple devices natively, most others too.

Does converting AAC to M4A reduce the quality?

AAC to M4A 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. AAC: Similar to MP3, slightly better quality. M4A coming back: Slightly smaller than MP3 at the same 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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