Convert OPUS to MP3
WhatsApp voice messages and many internet calls are recorded with the Opus codec. These files can be hard to open on a computer or bring into another program; converted to MP3, they play everywhere.
Free · no sign-up · your file is processed in your browser and never sent to a server
No file handy? Try it with a 20-second Turkish meeting recording.
How to use
- Choose your OPUS fileDrop one or more OPUS files. On this page the tool only accepts OPUS; for other formats, use the audio converter.
- Pick the qualityChoose the MP3 bitrate: 128 kbps for speech, 192–320 kbps for music.
- Convert and downloadFiles are processed one after another; each finished file comes with its own download link.
OPUS and MP3 at a glance
| OPUS | MP3 | |
|---|---|---|
| Codec | Opus (inside OGG or WebM) | MPEG Layer III |
| Type | Lossy | Lossy |
| Approx. size | Speech at 24–32 kbps: ~0.2 MB/min | 128 kbps: ~1 MB/min · 320 kbps: ~2.4 MB/min |
| Typical source | WhatsApp voice messages, internet calls, web meeting recordings | Music libraries, podcasts, recorder apps, almost every device |
Why convert?
- Listening to or archiving a voice message on a computer
- Attaching the recording to a program or web form
- Getting a voice message into a common format before transcribing it
Common issues with OPUS files
- Personal data: Voice messages contain other people's voices; since conversion happens in your browser, the file isn't shared with anyone.
- Low bitrate: Voice messages are compressed for speech; 64–128 kbps MP3 is enough.
- If the extension is .ogg: The same tool reads it; the OGG to MP3 page does the same job.
Privacy: your file never leaves your device
Everything happens in your browser. Your file is not sent to Voiser's servers or stored anywhere, and it's cleared from memory when you close the tab. That's also why the tool stays fast on a slow connection.
Common questions
How do I get a WhatsApp voice message as a file?
Save the message to your device using the app's share or export option, then choose it on this page. The steps may vary by app version.
Can I also turn the voice message into text?
Yes. After converting to MP3, you can transcribe it in Transcription.
Is my file safe?
Conversion happens in your browser; the file isn't sent to Voiser's servers or anywhere else.
Is my file uploaded to a server?
No. Your OPUS file is converted in your browser; it isn't sent to Voiser or anywhere else, and it isn't stored.
Related tools
- WhatsApp voice message to textTurn WhatsApp voice messages (.opus/.ogg) into readable text.
- Audio converterConvert files between MP3, WAV, M4A, OGG and FLAC.
- Extract audio from videoSave the audio track of your own videos as MP3, M4A or WAV.
- MP3 cutter and audio trimmerSelect any part of an audio file on the waveform and cut it out.
- Audio joinerMerge several audio files into one, in the order you choose.
Turn your converted recording into text.
Transcription turns speech into time-stamped text with separate speakers. Start with a free account.