About Opus to MP3
Voice notes from WhatsApp and Telegram are usually Opus (.opus or .ogg). MP3 lets you play, edit, or transcribe them anywhere.
Opus is decoded and encoded as MP3. 128 kbps is plenty for speech.
The FFmpeg engine (about 31 MB) downloads the first time you convert and is then cached by your browser. Files up to about 100 MB are supported because everything runs in browser memory.
Opus vs MP3
| Opus | MP3 | |
|---|---|---|
| What it is | Low-latency lossy audio | Lossy audio |
| Typical codecs | Opus (usually in Ogg) | MPEG-1 Layer III |
| Common use | WhatsApp/Telegram voice notes, Discord, WebRTC | Universal music and podcast format |
How to do it
- 1
Drop a Opus file into the converter above (already set to MP3).
- 2
Pick a bitrate if you want something other than 192 kbps.
- 3
Tap Convert, keep the tab open until it finishes, then download the MP3.