Convert AC3 to M4A
AC3 is great for home theatre and surround sound, but M4A is the better choice for high-quality music and voice recordings for Apple and Android devices. Convert AC3 to M4A 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 AC3 to M4A
- 1
Tap Choose files and select one or more AC3 files (or drag them in).
- 2
Check that M4A 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 M4A downloads automatically. Converting several files? Grab them all as a ZIP.
AC3 vs M4A
Both formats are lossy, so the audio is re-encoded once. Pick High quality to keep it as close to the original as possible, or Small for the smallest file.
| AC3 | M4A | |
|---|---|---|
| Full name | Dolby Digital (AC-3) | MPEG-4 Audio (AAC) |
| Type | Audio | Audio |
| Compression | Lossy | Lossy |
| Developed by | Dolby Laboratories | Apple / MPEG |
| Introduced | 1991 | 2001 |
| Plays on iPhone | ◐ Partly / with an app | ✓ Yes |
| Plays on Android | ◐ Partly / with an app | ✓ Yes |
| Plays on Windows | ✓ Yes | ✓ Yes |
| Plays on Mac | ✓ Yes | ✓ Yes |
About AC3 and M4A
AC3: AC3 is Dolby Digital surround sound, used on DVDs, Blu-rays and TV broadcasts. It supports up to 5.1 channels.
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.
Frequently asked questions
How do I convert AC3 to M4A on my phone?
Will converting AC3 to M4A reduce quality?
Is this AC3 to M4A converter free?
Are my files uploaded to a server?
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