Convert a WhatsApp voice note to MP3
Export or share the voice note so you have the .opus file, open it here, and download an MP3.
Drop an OPUS voice note
Decoded in the browser, then saved as MP3. You can drop several notes.
MP3, WAV, M4A, OGG, OPUS, AAC, FLAC
Mono is half the size and is enough for a voice note.
A higher bitrate keeps more detail and makes a larger file.
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How do I convert a WhatsApp voice note to MP3?
To convert a WhatsApp voice note to MP3, first share or export the voice note out of WhatsApp so you have the audio file, which is an .opus file. Then open that file in this tool, choose a bitrate of 128, 192, 256 or 320 kbps, with 192 kbps as the default, and download the MP3. The browser decodes the Opus audio on your own device and an in-browser encoder writes the MP3, so the voice note is never uploaded and no copy is kept. That matters for private messages. An MP3 plays on more devices and apps than an .opus file. Whether the file opens depends on the Opus support in your browser, and trying another browser often fixes a failed decode. It is free, with no account and no watermark.
How to use it
- Open the file A .opus file shared out of WhatsApp.
- Pick a bitrate 192 kbps is the default. Higher keeps more detail and makes a larger MP3.
- Download Download the MP3. Nothing is uploaded.
What the converter does
The browser decodes the file to audio samples, then saves an MP3. It does not create M4A, OGG, FLAC or M4R. If a video or unusual file will not open, the browser could not read its audio.
FAQ
Is the file uploaded?
No. The voice note is decoded and converted to MP3 in your browser, so a private message never leaves your device and no copy is kept. Closing or reloading the tab discards the file. WhatsApp itself is not involved after you export the file. You must have the right to use the voice note you convert.
Why is MP3 not identical to WAV?
MP3 throws away some detail to make a smaller file, while WAV keeps the decoded samples at 16-bit, so the two are not identical. A WhatsApp voice note is already a compressed Opus file, so converting it to MP3 compresses it again and cannot add detail back. For speech, 128 or 192 kbps is usually enough. The default is 192 kbps.
What if decode fails?
Open the page in another browser. Decoding a .opus file depends on the Opus support in your browser, so a note that fails in one browser may open in another. Make sure you exported the actual audio file and not a screenshot or a link. If the browser cannot read the audio, the tool cannot convert it.