Convert OPUS to AC3
OPUS is great for voice messages, calls and streaming at low bitrates, but AC3 is the better choice for home theatre and surround sound. Convert OPUS 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 OPUS to AC3
- 1
Tap Choose files and select one or more OPUS 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.
OPUS 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.
| OPUS | AC3 | |
|---|---|---|
| Full name | Opus Audio | Dolby Digital (AC-3) |
| Type | Audio | Audio |
| Compression | Lossy | Lossy |
| Developed by | IETF / Xiph.Org | Dolby Laboratories |
| Introduced | 2012 | 1991 |
| Plays on iPhone | ◐ Partly / with an app | ◐ Partly / with an app |
| Plays on Android | ✓ Yes | ◐ Partly / with an app |
| Plays on Windows | ✓ Yes | ✓ Yes |
| Plays on Mac | ✓ Yes | ✓ Yes |
About OPUS and AC3
OPUS: Opus is a modern, highly efficient codec used by WhatsApp voice notes, Discord, Zoom and WebRTC calls. It sounds excellent even at very low bitrates.
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 OPUS to AC3 on my phone?
Will converting OPUS to AC3 reduce quality?
Is this OPUS to AC3 converter free?
Are my files uploaded to a server?
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