AudioBinary

`audio/x-caf`

Core Audio Format

Reference for audio/x-caf, Apple's Core Audio Format container supporting any codec and unlimited file sizes.

MIME Type Detector

Drop a file to detect its MIME type — no upload, runs in your browser

📄

Drop any file here or click to choose

Expected extensions: .caf

HTTP Content-Type Header

HTTP Header

Content-Type: audio/x-caf

Associated File Extensions

.caf

Quick Facts

MIME Type	audio/x-caf
Category	Audio
Type	Binary
Extensions	.caf

Common Usage

CAF is Apple's flexible audio container format with no file size or duration limitations. It supports any audio codec available in Core Audio (AAC, ALAC, MP3, PCM, etc.).

Used by macOS and iOS for audio processing, recording, and internal audio operations.

Code Examples

HTML

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

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

Node.js

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

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

nginx

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

# Or set for a specific location
location /api/ {
    default_type audio/x-caf;
}