Convert AAC to M4A
Convert your AAC audio files to M4A directly in your browser.
How to convert audio in 3 steps
Choose a AAC audio file.
Click convert to M4A.
Download your M4A audio.
Format descriptions
AAC — AAC (Advanced Audio Coding) is a lossy audio codec that is more efficient than MP3 at the same bitrate. It is the standard for MP4 video and modern devices.
M4A — M4A is a compressed audio container based on MP4, usually using the AAC codec. It is very common on Apple devices and mobile phones.
Technical comparison: AAC vs M4A
Technical breakdown of the AAC and M4A specifications: compression, colour, transparency and animation support.
| Property | AAC | M4A |
|---|---|---|
| Specification | AAC (Advanced Audio Coding) | M4A (MPEG-4 Audio Container) |
| Media type | Audio | Audio |
| Compression | Lossy · LC / HE-AAC | Hybrid (lossy or lossless) · AAC / ALAC |
| Color space / bit depth | 16-bit up to 48 kHz | 16-bit up to 48 kHz |
| Transparency | Not applicable | Not applicable |
| Animation | No (static) | No (static) |
| Best for | AAC (Advanced Audio Coding) is a lossy audio codec that is more efficient than MP3 at the same bitrate. It is the standard for MP4 video and modern devices. | M4A is a compressed audio container based on MP4, usually using the AAC codec. It is very common on Apple devices and mobile phones. |
What happens when converting AAC to M4A?
The AAC data is decoded inside your browser with WebAssembly and re-encoded to the M4A specification, so no file is ever uploaded to a server. Both formats rely on comparable compression, so file size and perceived quality stay in the same range.
Frequently Asked Questions
What is audio conversion?
Audio conversion changes an audio file from one format to another, for example from AAC to M4A, while keeping the audio content.
Are my audio files uploaded?
No. This tool processes audio files directly in your browser. Your audio files are never sent to a server.
Which audio formats are supported?
This tool converts AAC audio files to M4A, all in your browser.
Is it really free and unlimited?
Yes, the tool is completely free and you can convert as many audio files as you want, with no limits.
Does it work on mobile too?
Yes, it works on any modern device, including smartphones, tablets and desktop computers.
Which format will the result be in?
The converted file will always be in M4A format, ready to download and use.
About the audio converter
Convert AAC to M4A audio online for free. Everything happens in your browser: your files are never uploaded to a server, and you need no downloads or sign-up to get started.
See also:
- Audio Converters
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- Convert AAC to MP3Convert AAC to MP3 audio online for free. Everything happens in your browser: your files are never uploaded to a server, and you need no downloads or sign-up to get started.
- Convert AAC to WAVConvert AAC to WAV audio online for free. Everything happens in your browser: your files are never uploaded to a server, and you need no downloads or sign-up to get started.
- Convert AAC to OGGConvert AAC to OGG audio online for free. Everything happens in your browser: your files are never uploaded to a server, and you need no downloads or sign-up to get started.