Converting a WhatsApp voice message to MP3
2026-10-12
WhatsApp voice messages are recorded with the Opus codec. It is very efficient for speech, which is why the files are tiny, but many editors, upload forms and older players do not open them. Converting one to MP3 fixes that.
What kind of file it is
| Where you got it | Typical file | Converter to use |
|---|---|---|
| Android phone storage | PTT-…-WA0001.opus | OPUS to MP3 |
| WhatsApp Web or the desktop app (Download) | .ogg | OGG to MP3 |
| iPhone (Forward, then Save to Files) | .opus, on older versions .m4a | OPUS to MP3 or M4A to MP3 |
The .opus and .ogg files contain the same kind of audio; only the name differs. Choose the converter that matches the ending of your file name.
Step 1: get the file
- Android. Open your file manager and look in Android › media › com.whatsapp › WhatsApp › Media › WhatsApp Voice Notes. The files are sorted into folders by week. Or, in the chat, press and hold the message, tap Share and save it to your files.
- iPhone. Press and hold the voice message, tap Forward, then the share icon, then Save to Files.
- Computer. In WhatsApp Web or the desktop app, open the menu on the voice message and choose Download.
Step 2: convert
- Open the converter from the table above, on the phone or the computer.
- Set quality to Small. It is more than a voice message needs.
- Choose the file. A voice message of a minute or two converts in a few seconds once the engine has loaded.
The message is converted on your own device and is not uploaded. For private conversations, which is what voice messages are, that matters more than usual. If you want to be sure, this guide describes a one-minute offline test.
Why the MP3 is much bigger
This surprises people. WhatsApp records voice at a very low bitrate, and Opus copes with that well. MP3 needs far more data for the same result, and the lowest setting here is 128 kbps, about 1 MB per minute. A voice message of a few hundred kilobytes can easily become several megabytes. Nothing has gone wrong, and the larger file does not sound better than the original.
Things to know
- Quality is fixed by the original. A voice message sounds like a phone call because it was recorded like one. Converting cannot improve it.
- Several messages become several files. You can select many at once and they are converted in turn, but they are not joined into one recording.
- Music or audio sent as a file is different. If someone sent an MP3 or M4A as an attachment rather than recording a voice message, it is already in that format and needs no conversion.
- For transcription, WAV is the safer target, because almost every transcription tool accepts it. Use OPUS to WAV or OGG to WAV.
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