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Convert MP3 to OPUS
MP3 is lossy, and some audio editors, phone systems and tools want uncompressed sound. Opus gives the best quality at low bitrates and is very efficient for speech.
- Free
- No sign-up
- Batch conversion
Why convert MP3 to OPUS?
To convert MP3 files to OPUS, drop them on the counter above.
Most files convert in seconds: no queue, no email address, and the OPUS result saves straight to your computer or phone.
How to convert MP3 to OPUS
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Add your MP3 files
Drag your MP3 files onto the counter or pick them with Choose files. You can add several at once.
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Check the settings
The defaults suit most cases. Change quality, size or other options if you like; after a change, one click converts again.
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Conversion starts by itself
Each file is converted to OPUS and its row is stamped CONVERTED.
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Download your OPUS file
Get the file with Download. With several files you can download them all as one ZIP.
MP3 vs OPUS
| Property | MP3 | OPUS |
|---|---|---|
| Full name | MPEG-1 Audio Layer III | Opus Interactive Audio Codec |
| Type | Audio | Audio |
| Compression | Lossy | Lossy |
| Created by | Fraunhofer IIS / MPEG | IETF (RFC 6716) |
| Year | 1993 | 2012 |
| Extensions | .mp3 | .opus |
| MIME | audio/mpeg | audio/opus |
About the formats
MP3
MPEG-1 Audio Layer III
MP3 is the most widespread audio format in the world. Lossy compression shrinks files to about a tenth of WAV, and it plays on every device.
OPUS
Opus Interactive Audio Codec
Opus is an open audio codec for speech and music with very low latency. WhatsApp voice notes are saved as .opus files.
Frequently asked questions
Is converting MP3 to OPUS free?
Yes, completely free. No account, no daily limit, no watermark and no queue.
Does it work on a phone?
Yes. It works on iPhone, iPad and Android, with no app to install.
Is there a file size limit?
There is no size limit set by us. Files of hundreds of MB convert too; very large files take longer and are handled more comfortably on a computer than on a phone.
Other conversions
| Family | Give | → | Get | What you gain |
|---|---|---|---|---|
| OPUS | MP3 | plays on every device | ||
| MP3 | WAV | lossless, ready to edit · larger file | ||
| MP3 | M4A | better than MP3 at the same size | ||
| MP3 | OGG | open and royalty-free | ||
| MP3 | AAC | broadcast-grade audio | ||
| MP3 | FLAC | lossless at half size · larger file | ||
| WAV | OPUS | most efficient for speech · studio recording | ||
| M4A | OPUS | most efficient for speech · iPhone voice memo | ||
| AAC | OPUS | most efficient for speech · raw AAC stream | ||
| OGG | OPUS | most efficient for speech · Telegram voice message | ||
| FLAC | OPUS | most efficient for speech · lossless archive | ||
| WMA | OPUS | most efficient for speech · old Windows Media audio |