Convert AC3 to AAC
AC3 is great for home theatre and surround sound, but AAC is the better choice for efficient music files and broadcast audio. Convert AC3 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 AC3 to AAC
- 1
Tap Choose files and select one or more AC3 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.
AC3 vs AAC
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 | AAC | |
|---|---|---|
| Full name | Dolby Digital (AC-3) | Advanced Audio Coding (raw ADTS) |
| Type | Audio | Audio |
| Compression | Lossy | Lossy |
| Developed by | Dolby Laboratories | MPEG |
| Introduced | 1991 | 1997 |
| 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 AAC
AC3: AC3 is Dolby Digital surround sound, used on DVDs, Blu-rays and TV broadcasts. It supports up to 5.1 channels.
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 AC3 to AAC on my phone?
Will converting AC3 to AAC reduce quality?
Is this AC3 to AAC converter free?
Are my files uploaded to a server?
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