Convert M4A to AAC
M4A is great for high-quality music and voice recordings for Apple and Android devices, but AAC is the better choice for efficient music files and broadcast audio. Convert M4A to AAC in seconds, right in your browser.
- No upload — 100% private
- Fast, lossless when possible
- Free & unlimited
- Works on iPhone & Android
Keep this tab open — the conversion runs on your device, nothing is uploaded.
Add more files above to keep converting.
How to convert M4A to AAC
- 1
Tap Choose files and select one or more M4A files (or drag them in).
- 2
Check that AAC is selected. Use Advanced options for bitrate, channels or trimming.
- 3
Press Convert. Everything happens on your device — no upload, no waiting in a queue.
- 4
Your AAC downloads automatically. Converting several files? Grab them all as a ZIP.
M4A vs AAC
M4A and AAC can hold the same codecs, so in Smart mode the streams are copied — the conversion takes seconds and quality is identical to the original.
| M4A | AAC | |
|---|---|---|
| Full name | MPEG-4 Audio (AAC) | Advanced Audio Coding (raw ADTS) |
| Type | Audio | Audio |
| Compression | Lossy | Lossy |
| Developed by | Apple / MPEG | MPEG |
| Introduced | 2001 | 1997 |
| Plays on iPhone | ✓ Yes | ✓ Yes |
| Plays on Android | ✓ Yes | ✓ Yes |
| Plays on Windows | ✓ Yes | ✓ Yes |
| Plays on Mac | ✓ Yes | ✓ Yes |
About M4A and AAC
M4A: M4A is an MPEG-4 container holding AAC audio. It sounds better than MP3 at the same size and is the default format for iPhone voice memos, Apple Music downloads and many Android recorders.
AAC: AAC is the successor to MP3 and the audio codec behind YouTube, iTunes and most streaming services. A .aac file stores the raw AAC stream without an MP4 wrapper.
Frequently asked questions
How do I convert M4A to AAC on my phone?
Will converting M4A to AAC reduce quality?
Is this M4A to AAC converter free?
Are my files uploaded to a server?
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