FontBinary

`application/x-font-opentype`

OpenType (Legacy MIME)

Reference for application/x-font-opentype, the legacy MIME type for OpenType fonts before the font/* types were standardized.

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Expected extensions: .otf

HTTP Content-Type Header

HTTP Header

Content-Type: application/x-font-opentype

Associated File Extensions

.otf

Quick Facts

MIME Type	application/x-font-opentype
Category	Font
Type	Binary
Extensions	.otf

Common Usage

This is the older, unofficial MIME type for OpenType fonts that was used before font/otf was standardized. Like its TrueType counterpart, some legacy systems still use this type.

Modern configurations should use font/otf instead.

Code Examples

HTML

<!-- Link or embed with explicit type -->
<link rel="stylesheet" href="file.otf" type="application/x-font-opentype">

<!-- Or for script/media elements -->
<script type="application/x-font-opentype" src="file.otf"></script>

Node.js

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

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

nginx

# nginx.conf — add to types block or use default
types {
    application/x-font-opentype  otf;
}

# Or set for a specific location
location /api/ {
    default_type application/x-font-opentype;
}