Convert OPUS to MP3 online
Convert a OPUS file to MP3 directly in your browser — the file is never uploaded to a server.
or click to select it
Convert an Opus file — the codec behind WhatsApp voice notes, Discord and Telegram audio, and most WebRTC calls — into MP3, a format that opens in any media player.
Opus was designed for real-time voice and streaming, squeezing surprisingly clear speech into very low bitrates, which is why messaging apps use it for voice notes and calls. This tool decodes that Opus audio and re-encodes it as MP3 so it plays on players, phones and software that don't support Opus natively.
Use cases
- Convert a WhatsApp or Telegram voice note exported as .opus into MP3 so it plays on any phone.
- Turn a Discord voice recording into MP3 for editing in software that doesn't support Opus.
- Save a WebRTC call recording as MP3 for archiving or sharing.
How it works
- 1
Upload your Opus file
Drop the file in or select it from your device.
- 2
Adjust the bitrate if you want
A high automatic quality is used by default; you can set a specific bitrate in the options.
- 3
Download the MP3
Once it's done, download the resulting file.
Technical details
Runs ffmpeg.wasm in your browser. Opus can sound clear at bitrates as low as 16-32kbps, well below what MP3 needs for similar speech quality, but its adoption outside messaging and web apps is still limited — most standalone media players and older phones have no Opus decoder, which is the main reason to convert exported .opus files to MP3.
Frequently asked questions
Why did my chat app export a voice note as .opus?
Apps like WhatsApp and Telegram record voice notes using the Opus codec because it keeps files small while sound quality stays clear even over a poor connection; the .opus file is what gets saved when you export the recording.
Can I play .opus files without converting them?
Some apps and browsers play Opus natively, but many standalone media players, car stereos and older phones can't. Converting to MP3 sidesteps that.