How to use the OPUS to MP3 converter
- Save the voice notes to your phone or computer and add them here.
- For speech choose 64 or 96 kbps and Mono; 192 kbps suits music.
- Convert and download.
Why chat apps use Opus
Messaging apps record speech with Opus at a few dozen kbps or less, because voices stay intelligible in a tiny file. The cost is compatibility: plenty of software has never heard of it.
The MP3 is larger but opens everywhere. One minute of voice at 64 kbps mono MP3 is roughly 480 KB, so even a long rambling message stays easy to email or attach to a support ticket.
Sample rate choices
Opus always decodes at 48 kHz, and that carries into the MP3 unless More settings says otherwise: 44.1 kHz and 22.05 kHz are both offered. For speech, 22.05 kHz is plenty and helps the encoder at low bitrates.
WhatsApp sometimes names voice notes .ogg rather than .opus. Those go through the OGG to MP3 page instead.
For transcription and captions
Speech-to-text and captioning services commonly take MP3 but not Opus. For dictation, a 64 kbps mono MP3 is clear enough; anything higher just grows the upload.
Even a voice note several minutes long converts in a second or two, and because it never leaves your device, private conversations stay private.
Questions
How do I get a voice note out of WhatsApp?
Long-press the message and use Share to store it in your Files app. Next, load this page in the phone’s browser and add the saved note.
Does it handle long Discord recordings?
Yes. Audio is light to process, so long recordings fit comfortably in browser memory.
Can I keep it as Opus but smaller?
Yes. The audio compressor keeps Opus files in their own format at a lower bitrate.
Which bitrate for music shared as Opus?
Use 192 kbps for music. Voice notes need far less, so 64 or 96 kbps mono keeps them small.