Convert Opus to MP3
Change .opus files, such as WhatsApp voice notes, into MP3 for apps and players that don't support Opus. Free, no account, up to 50 MB.
Change .opus files, such as WhatsApp voice notes, into MP3 for apps and players that don't support Opus. Free, no account, up to 50 MB.
Opus is a modern codec built for voice and music sent over the internet. WhatsApp voice notes are Opus files, and the same codec sits inside many recordings made by browsers, calling apps and chat services. It sounds good at very low bitrates, but support outside browsers and Android is uneven: some Windows and iPhone apps, older car stereos, transcription tools and upload forms won't take a .opus file. An MP3 opens almost anywhere.
This page turns your Opus file into a 192 kbps CBR MP3. Opus audio is always decoded at 48 kHz, so the MP3 will be 48 kHz as well. A mono voice note stays mono and stereo stays stereo. You don't pick a bitrate or quality level; the settings are fixed.
Voice messages are usually encoded somewhere around 16 to 32 kbps, and Opus is designed to stay clear of heavy artifacts at those rates. When you convert, the MP3 encoder faithfully stores what the Opus decoder produces. It can't recover detail the original encoding left out, so the MP3 sounds like the voice note did, never better. What does change is size.
| Opus bitrate | Opus per minute | MP3 per minute | Size change |
|---|---|---|---|
| 16 kbps (low-bitrate voice) | 0.12 MB | 1.44 MB | about 12x larger |
| 32 kbps (voice) | 0.24 MB | 1.44 MB | about 6x larger |
| 64 kbps | 0.48 MB | 1.44 MB | about 3x larger |
| 128 kbps (music) | 0.96 MB | 1.44 MB | about 1.5x larger |
For music encoded at 128 kbps or more, this is a lossy-to-lossy step. A small amount of extra loss occurs, which most people won't notice at 192 kbps. If storage or data use matters more to you than compatibility, keeping the original Opus is the smarter choice.
.opus.Telegram and Discord voice messages normally hold Opus audio in a file ending .ogg. Upload it as it is; the converter looks at the audio inside, not only the name. The OGG to MP3 page covers those files. Files ending in .oga are accepted too.
Online voice recorders and screen-capture tools often save Opus inside a .webm file. Those upload fine too; see WebM to MP3 for details.
To save data, low-bitrate voice notes are encoded with a limited frequency range. The MP3 reproduces exactly that range, so a dull or boxy voice note stays dull. Nothing went wrong during conversion.
Check that it's under 50 MB and has one of the accepted extensions. Opus music in a very long recording can pass the limit; trim it into parts first. You can read more about the format itself on the Opus converter page.
| OPUS | MP3 | |
|---|---|---|
| Full name | Opus Interactive Audio Codec | MPEG-1/2 Audio Layer III |
| Compression | Lossy | Lossy |
| Developed by | IETF (Xiph.Org, Skype, Mozilla and others) | Fraunhofer IIS / MPEG |
| Introduced | 2012 | 1993 |
| File extension | .opus | .mp3 |
| Typically used for | Voice chat, VoIP, voice notes, streaming | Music libraries, podcasts, everyday listening |
| Plays on | Chrome, Firefox, Edge, Android, VLC; newer and partial on Apple devices | Virtually every phone, computer, browser, car stereo and media player |
| Our output | Opus in Ogg, 128 kbps, 48 kHz stereo | LAME MP3, 192 kbps CBR, stereo |
First save the voice note as a file. On Android it sits in WhatsApp's Media folder under WhatsApp Voice Notes; on an iPhone, long-press the message and share it to the Files app. Then upload the .opus file on this page, keep MP3 as the output, click Convert and download the result.
Voice notes are usually encoded at very low bitrates, often around 16 to 32 kbps, while our MP3 output is always 192 kbps. That works out to about 1.44 MB per minute, so a low-bitrate voice note can grow roughly six to twelve times in size. The extra bytes don't add any quality.
No. The MP3 stores what the Opus decoder produces, including its limited frequency range and any artifacts. A higher bitrate can't recover detail that was removed when the voice note or track was first encoded. The benefit of converting is compatibility with players, editors and upload forms that don't accept Opus.
Yes. Those voice messages usually contain Opus audio in a file ending .ogg, which is an accepted upload type, so you can convert them as they are; files ending .oga are accepted too. The MP3 will be 192 kbps at 48 kHz, in mono if the message was mono.
Your uploaded file is deleted as soon as it has been converted, and the MP3 plus any leftovers are deleted automatically within about an hour. We don't listen to or keep your audio. Conversion runs on our servers, so download the MP3 soon after it's ready.
Need detailed information or want to set a different default format? Visit our specific converter pages: