Convert MP3 to AC3
MP3 is great for sharing music, podcasts and ringtones that play on every device, but AC3 is the better choice for home theatre and surround sound. Convert MP3 to AC3 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 MP3 to AC3
- 1
Tap Choose files and select one or more MP3 files (or drag them in).
- 2
Check that AC3 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 AC3 downloads automatically. Converting several files? Grab them all as a ZIP.
MP3 vs AC3
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.
| MP3 | AC3 | |
|---|---|---|
| Full name | MPEG-1 Audio Layer III | Dolby Digital (AC-3) |
| Type | Audio | Audio |
| Compression | Lossy | Lossy |
| Developed by | Fraunhofer IIS | Dolby Laboratories |
| Introduced | 1993 | 1991 |
| Plays on iPhone | ✓ Yes | ◐ Partly / with an app |
| Plays on Android | ✓ Yes | ◐ Partly / with an app |
| Plays on Windows | ✓ Yes | ✓ Yes |
| Plays on Mac | ✓ Yes | ✓ Yes |
About MP3 and AC3
MP3: MP3 is the most widely supported audio format in the world. It uses lossy compression to make music and voice files small enough to share, while keeping quality good enough for everyday listening.
AC3: AC3 is Dolby Digital surround sound, used on DVDs, Blu-rays and TV broadcasts. It supports up to 5.1 channels.
Frequently asked questions
How do I convert MP3 to AC3 on my phone?
Will converting MP3 to AC3 reduce quality?
Is this MP3 to AC3 converter free?
Are my files uploaded to a server?
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