MultipartText-based

`multipart/form-data`

Form Data (Multipart)

Reference for multipart/form-data, the MIME type for HTML form submissions that include file uploads.

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HTTP Content-Type Header

HTTP Header

Content-Type: multipart/form-data; charset=utf-8

Quick Facts

MIME Type	multipart/form-data
Category	Multipart
Type	Text-based (human-readable)

Common Usage

multipart/form-data is used when HTML forms include file uploads. Each form field is sent as a separate part with its own Content-Type.

This is the required encoding type for file upload forms and is used by fetch/XHR when sending FormData objects with binary content.

Code Examples

HTML

<!-- Set MIME type in meta or fetch headers -->
<meta http-equiv="Content-Type" content="multipart/form-data">

Node.js

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

// Node.js http
res.writeHead(200, { 'Content-Type': 'multipart/form-data' });

nginx

# nginx.conf — add to types block or use default
types {
    multipart/form-data  data;
}

# Or set for a specific location
location /api/ {
    default_type multipart/form-data;
}