Convert OPUS to AAC
OPUS is great for voice messages, calls and streaming at low bitrates, but AAC is the better choice for efficient music files and broadcast audio. Convert OPUS 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 OPUS to AAC
- 1
Tap Choose files and select one or more OPUS 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.
OPUS 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.
| OPUS | AAC | |
|---|---|---|
| Full name | Opus Audio | Advanced Audio Coding (raw ADTS) |
| Type | Audio | Audio |
| Compression | Lossy | Lossy |
| Developed by | IETF / Xiph.Org | MPEG |
| Introduced | 2012 | 1997 |
| Plays on iPhone | ◐ Partly / with an app | ✓ Yes |
| Plays on Android | ✓ Yes | ✓ Yes |
| Plays on Windows | ✓ Yes | ✓ Yes |
| Plays on Mac | ✓ Yes | ✓ Yes |
About OPUS and AAC
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.
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 OPUS to AAC on my phone?
Will converting OPUS to AAC reduce quality?
Is this OPUS to AAC converter free?
Are my files uploaded to a server?
Rate this tool
Be the first to rate it.
Thanks for rating! ❤️