AudioBinary

`audio/opus`

Opus

Reference for audio/opus, the versatile open audio codec excelling at both speech and music across all bitrates.

MIME Type Detector

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Expected extensions: .opus

HTTP Content-Type Header

HTTP Header

Content-Type: audio/opus

Associated File Extensions

.opus

Quick Facts

MIME Type	audio/opus
Category	Audio
Type	Binary
Extensions	.opus

Common Usage

Opus is an open, royalty-free audio codec that outperforms all other codecs across the entire bitrate range. It is the mandatory codec for WebRTC voice and video calls, used in Discord, WhatsApp calls, Zoom, and streaming applications.

Opus adapts between speech and music encoding.

Code Examples

HTML

<!-- Link or embed with explicit type -->
<link rel="stylesheet" href="file.opus" type="audio/opus">

<!-- Or for script/media elements -->
<script type="audio/opus" src="file.opus"></script>

Node.js

// Express.js
app.get('/file', (req, res) => {
  res.type('audio/opus');
  res.send(data);
});

// Node.js http
res.writeHead(200, { 'Content-Type': 'audio/opus' });

nginx

# nginx.conf — add to types block or use default
types {
    audio/opus  opus;
}

# Or set for a specific location
location /api/ {
    default_type audio/opus;
}