How to convert OPUS to MP3
- 1. Add the voice notesClick Choose OPUS files or drop them in. Voice notes saved as .ogg are accepted too.
- 2. Click ConvertThe default of 192 kbps is more than enough; 128 kbps suits speech and keeps files smaller. Conversion begins when you click Convert.
- 3. Download the MP3sTap Download on each row, or use Download all (.zip) to keep a whole conversation's voice notes together.
Why voice messages are in a format nothing opens
Opus is an open, royalty-free audio codec standardized by the IETF in 2012 (RFC 6716). It's excellent at keeping speech clear at very low bitrates, which is why messaging apps use it: voice notes stay tiny and still sound natural.
The catch is that once you save a voice note outside the app, you get a .opus or .ogg file that many players, editors, transcription services and Apple apps won't open. MP3 fixes that.
| Opus (voice note) | MP3 | |
|---|---|---|
| Designed for | Speech and music, especially at low bitrates | Music and general audio |
| Typical file | .opus or .ogg from a messaging app | .mp3 |
| Size of a one-minute voice note | Very small | About 1 MB at 128 kbps |
| Opens in | Messaging apps, Chrome, Firefox, some players | Practically every app and device |
| Good for | Sending messages quickly | Keeping, sharing, editing, transcribing |
Your messages stay private
Voice notes are some of the most personal recordings people have: family messages, conversations with a doctor or lawyer, the last messages from someone who has died. They shouldn't have to pass through a stranger's server just to change format.
This converter decodes and re-encodes the audio inside your browser. The recording never leaves your phone or computer.
Getting voice notes out of WhatsApp and Telegram
The menus change between app versions, so these are the general routes rather than exact taps:
- WhatsApp, single message: long-press the voice note and look for a Share option (on iPhone it's under Forward, then the share icon). Save it to Files or your Downloads.
- WhatsApp, many messages: open the chat's info and use Export chat with media. The voice notes come out as separate audio files.
- Telegram Desktop: right-click a voice message and choose to save it as a file.
- Once the file is on your device, open this page and choose it. On iPhone, pick it from the Files app.
What to expect from the result
- The MP3 will usually be bigger than the original voice note. Opus is far more efficient for speech, so that's normal.
- Converting won't make a muffled or noisy recording clearer. It keeps the sound as it is.
- File names are kept, with .mp3 at the end. Messaging apps often name voice notes with a date or a number, so rename them if you're archiving.
- For a recording you'll edit or burn to CD, you can turn the MP3 into an uncompressed file with the MP3 to WAV tool.
Frequently asked questions
How do I convert a WhatsApp voice message to MP3?
Save the voice message out of WhatsApp as a file (using Share or Export chat with media), then choose it on this page and click Convert. The MP3 downloads to your device.
How do I convert a Telegram voice message to MP3?
Save the voice message as a file (on Telegram Desktop, right-click it), then drop it here and click Convert. Telegram voice messages are Opus audio in an .ogg file, which is supported.
Are my voice messages uploaded?
No. They're converted on your device and never uploaded. The page loads its own code, ads and cookieless analytics like any website, but your recordings stay in your browser. See how to check.
Which bitrate should I use for voice notes?
128 kbps is more than enough for speech. Higher bitrates only make the file bigger, because the original voice note was recorded at a much lower bitrate.
Why is the MP3 bigger than the voice note?
Opus is designed to keep speech clear at very low bitrates; MP3 needs much more data for the same recording. The sound quality stays the same as the original.
Can I convert many voice notes at once?
Yes. Add them all, click Convert once and save them as one ZIP with Download all (.zip).
Does this work on iPhone?
Yes. Save the voice note to the Files app, open this page in Safari, choose the file and tap Convert. The MP3 goes to Files → Downloads.
Does the MP3 keep the Opus file's tags?
Yes, by default. Title, artist, album, date, track, genre, comment and cover art in the Opus file are copied into the MP3's ID3 tag. Voice messages rarely have any. Set Metadata to Remove for an MP3 without tags.