A little utility to get the mime-type from binary files.

Unlike mime, mime-sniffer uses magic numbers instead of file extensions to get a more accurate (and less easily faked) mime-type for a given file.

npm install mime-sniffer --save

var mime = require('mime-sniffer');

mime.lookup('/path/to/file.jpg', function(err, info) {
	console.log(info); // { mime: 'image/jpeg', extension: 'jpg' }
});

You can also pass in a Buffer:

var fs = require('fs');
var mime = require('mime-sniffer');

mime.lookup(fs.readFileSync('/path/to/file.jpg'), function(err, info) {
	// { mime: 'image/jpeg', extension: 'jpg' }
});

To see what file types are supported, take a peek in the lib/numbers.js file.

Currently, mime-sniffer supports:

• gif
• png
• jpg
• webp
• tiff
• bmp

• mp4
• mov
• webm

• mp3
• ogg
• flac
• wav

• pdf

MIT