Convert AAC to M4A
Turn your AAC file into an M4A that plays where you need it, right in your browser.
- Free to start
- In your browser
- Up to 1GB
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.
Confirm M4A as the output
M4A is already selected for your AAC. Switch between MP3 and WAV 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, or keep editing it in REQO.
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
Typical codecs
Best for
Plays on
File size
| 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 |
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 no watermark on the M4A itself beyond the free-plan badge.
Do I need to install any software?
No. The conversion runs on our servers and the whole flow happens in your browser, 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.
Other formats
Everything else you can do here.
Every conversion for a format
Convert to MP4
Convert to WebM
Convert to AVI
Convert to WMV
Convert to 3GP
Convert to M4V
Convert to MPEG
Convert to GIF
Convert to MP3
Convert to WAV
Convert AAC to M4A now
Free, in your browser, and the file stays open in a full video editor afterwards.