ApplicationBinary

`application/vnd.openxmlformats-officedocument.spreadsheetml.sheet`

Excel Spreadsheet (OOXML)

Reference for the .xlsx MIME type, the modern Microsoft Excel spreadsheet format based on Office Open XML.

MIME Type Detector

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Expected extensions: .xlsx

HTTP Content-Type Header

HTTP Header

Content-Type: application/vnd.openxmlformats-officedocument.spreadsheetml.sheet

Associated File Extensions

.xlsx

Quick Facts

MIME Type	application/vnd.openxmlformats-officedocument.spreadsheetml.sheet
Category	Application
Type	Binary
Extensions	.xlsx

Common Usage

XLSX is the default spreadsheet format for modern Microsoft Excel. It stores data, formulas, charts, and formatting in a ZIP-based XML structure.

Used for financial modeling, data analysis, reporting, and data exchange across business applications.

Code Examples

HTML

<!-- Link or embed with explicit type -->
<link rel="stylesheet" href="file.xlsx" type="application/vnd.openxmlformats-officedocument.spreadsheetml.sheet">

<!-- Or for script/media elements -->
<script type="application/vnd.openxmlformats-officedocument.spreadsheetml.sheet" src="file.xlsx"></script>

Node.js

// Express.js
app.get('/file', (req, res) => {
  res.type('application/vnd.openxmlformats-officedocument.spreadsheetml.sheet');
  res.send(data);
});

// Node.js http
res.writeHead(200, { 'Content-Type': 'application/vnd.openxmlformats-officedocument.spreadsheetml.sheet' });

nginx

# nginx.conf — add to types block or use default
types {
    application/vnd.openxmlformats-officedocument.spreadsheetml.sheet  xlsx;
}

# Or set for a specific location
location /api/ {
    default_type application/vnd.openxmlformats-officedocument.spreadsheetml.sheet;
}