How to use the OPUS converter
- Choose a file. Drop an OPUS file to convert it to something else, or any other audio file to convert it to OPUS.
- Check "Convert to". The converter picks MP3 for OPUS files and OPUS for everything else; change it if you need something different.
- Adjust quality if you want a smaller or higher-quality file.
- Click Convert and download the result.
What is an OPUS file?
Opus is a modern open codec that beats MP3 and AAC at every bitrate, especially for speech. WhatsApp voice notes, Discord, Zoom and YouTube all use Opus.
OPUS is mainly used for voice notes, calls, YouTube audio and podcasts. It plays on Android, Chrome, Firefox and VLC; some car stereos and older Apple apps cannot play .opus files.
OPUS at a glance
| Full name | Opus Interactive Audio Codec |
|---|---|
| Type | Audio |
| Created by | the IETF (Xiph.Org and others), 2012 |
| Compression | Lossy |
| Codec | Opus |
| Can be created here | Yes |
Pros and cons of OPUS
Good
- Best quality per kilobyte of any common codec
- Excellent for speech
Not so good
- Not supported by many older players and car stereos
Common OPUS problems and fixes
A WhatsApp voice note (.opus) will not play on a PC
Convert OPUS to MP3.
Popular OPUS conversions
Frequently asked questions
How do I open an OPUS file?
OPUS files play on Android, Chrome, Firefox and VLC; some car stereos and older Apple apps cannot play .opus files. If yours will not open, convert it to MP3 on this page; that format plays on any device.
How do I convert a file to OPUS?
Drop any audio file on this page. "Convert to" is set to OPUS automatically for files that are not OPUS already.
Is the OPUS converter free?
Yes, completely free, with no sign-up and no watermark. Files up to 1 GB each can be converted, and there is no daily limit.
Is my file uploaded to a server?
No. The converter runs inside your browser using WebAssembly, so your file is processed on your own device and never sent to us or anyone else.
Is OPUS lossy?
Yes, OPUS normally uses lossy compression, which removes detail you are unlikely to notice to keep files small.