AAC → M4A
Convert AAC to M4A
Free, instant and 100% private. Your AAC file is converted on your own device and never uploaded anywhere.
Drop your AAC file here
or click to choose — converted to M4A instantly, on your device
Nothing is uploaded. Your files never leave this browser.
Converting AAC to M4A is a common task when you need better quality than mp3 per byte. AAC (Advanced Audio Coding) is the successor to MP3, delivering better sound at the same bitrate. It powers YouTube, Apple Music and most streaming, and is widely (though not universally) supported. M4A, on the other hand, gives you better quality than mp3 per byte and efficient compression. ZeroUpload performs this conversion entirely inside your browser, so your AAC file is never uploaded to a server.
How to convert AAC to M4A
- 1
Drop your AAC file into the box (or click to select it).
- 2
ZeroUpload converts it to M4A instantly, right inside your browser.
- 3
Download your new M4A file. Nothing was ever uploaded.
When should you convert AAC to M4A?
You should convert AAC to M4A when you want Apple ecosystem audio but your source is AAC. Typical situations include streaming and downloads, higher quality than MP3 at the same size, where the destination expects M4A instead.
AAC vs M4A
Advanced Audio Coding (AAC)
AAC (Advanced Audio Coding) is the successor to MP3, delivering better sound at the same bitrate. It powers YouTube, Apple Music and most streaming, and is widely (though not universally) supported.
Strengths
- + Better quality than MP3 per byte
- + Widely supported
- + Streaming standard
Trade-offs
- – Lossy
- – Slightly less universal than MP3
MPEG-4 Audio (AAC) (M4A)
M4A is an MPEG-4 audio container, usually holding AAC. It offers better quality than MP3 at the same bitrate and is the default for iTunes, Apple Music and voice memos, but plays less universally than MP3.
Strengths
- + Better quality than MP3 per byte
- + Efficient compression
- + Standard on Apple devices
Trade-offs
- – Less universal than MP3
- – Occasionally rejected by older players
Frequently asked questions
How do I convert AAC to M4A? +
Drop your AAC file into the box above (or click to choose it), and ZeroUpload converts it to M4A right inside your browser. Then download the result. No account, no waiting.
Is it safe to convert AAC files here? +
Completely. ZeroUpload does the entire conversion on your own device. Your AAC file is never uploaded to any server, so your data stays 100% private.
Does converting AAC to M4A cost anything? +
No. It is free with no limits and no signup. Because the conversion runs on your device, there are no server costs and therefore no paywalls.
What is the difference between AAC and M4A? +
AAC is a modern lossy codec offering better quality than MP3 at the same bitrate. M4A is Apple's efficient AAC audio format used by iTunes and Apple Music. Converting from AAC to M4A trades better quality than mp3 per byte for better quality than mp3 per byte.
Will it work offline? +
Yes. Once the page (and engine) has loaded, the AAC to M4A conversion works even with your internet disconnected, because everything happens locally.