Convert AAC to M4A
Convert any audio file to M4A format online for free. Fast, secure, and easy-to-use audio to M4A converter with no software installation required.
Drag & Drop Audio File
or click below to browse
Supported formats (Max 50MB, 30 min • Sign in for 200MB, 1 hr)
Why Choose Scriptivox AAC to M4A Converter?
Fast Conversion
Our powerful servers process your files quickly, delivering converted files in seconds.
100% Free
Convert your files completely free with no hidden costs or subscription fees.
Secure & Private
Your files are encrypted and automatically deleted after conversion. We never store or share your data.
No Installation
Works directly in your web browser. No software download or installation required.
How to Use AAC → M4A
Upload File
Drag and drop your AAC file or click to browse. Supports files up to 1GB.
Convert
Select M4A as your output format and click convert. Our servers will process your file instantly.
Download
Download your converted file instantly. The download link expires in 1 hour for security.
AAC vs M4A: format comparison
How the two formats differ on the things that change your result.
| Specification | AAC (source) | M4A (result) |
|---|---|---|
| Container | ADTS / raw AAC | MPEG-4 Part 14 |
| Developed by | MPEG / Fraunhofer IIS | Apple / MPEG |
| Introduced | 1997 | 2003 |
| Audio codecs | AAC-LC, HE-AAC | AAC-LC, HE-AAC, ALAC |
| Compression | Lossy | Depends on codec |
| Typical bitrate | 96–256 kbps | 96–256 kbps |
| Max sample rate | 96 kHz | 96 kHz |
| Max channels | 8 | 8 |
| Gapless playback | Partial | Yes |
| Metadata / tags | ID3v2 (limited in ADTS) | MPEG-4 iTunes-style atoms |
| Approx. file size | 0.72–1.92 MB per minute | 0.72–1.92 MB per minute |
| Licensing | Patent-licensed | Patent-licensed |
| Plays natively on | Native: Web browsers, Windows, macOS, iOS, Android, Smart TVs | Native: Web browsers, Windows, macOS, iOS, Android, Smart TVs |
| Best for | streaming services, mobile playback, broadcast | the Apple ecosystem, music libraries, audiobooks |
What changes when you convert AAC to M4A
Note that MPEG-4 Part 14 does not imply one specific codec. It can wrap AAC-LC, HE-AAC, ALAC, so the compression behaviour of the result depends on the codec chosen rather than on the extension alone.
This conversion moves the file toward a different purpose: AAC suits streaming services, mobile playback, broadcast, whereas M4A is chosen for the Apple ecosystem, music libraries, audiobooks.
Tags do not transfer verbatim. AAC stores them as ID3v2 (limited in ADTS) while M4A uses MPEG-4 iTunes-style atoms, so titles and artwork are remapped and unusual custom fields may not survive.
About AAC to M4A Conversion
Converting AAC to M4A means moving audio out of the ADTS / raw AAC container, introduced in 1997, and into MPEG-4 Part 14, which arrived in 2003. The two were designed with different priorities, and that is what determines whether this conversion costs you quality, storage, or compatibility.
Developed by MPEG / Fraunhofer IIS in 1997, AAC stores audio using AAC-LC, HE-AAC. That codec choice sets the upper bound on what any conversion can preserve.
M4A, from Apple / MPEG and dating to 2003, uses AAC-LC, HE-AAC, ALAC and plays natively on 6 of the six platform categories we track. That combination is usually why people convert into it.
After converting your file, you can use Scriptivox transcription services to convert your audio to text. Perfect for meetings, interviews, podcasts, and more.
AAC to M4A: common questions
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