Usage in Node.js

Just use npm to install jbinary and you are set :)

npm install jbinary

var fs = require('fs');
var jBinary = require('jbinary');

jBinary.loadData('file.bin', function (err, data) {
  var binary = new jBinary(data, {
    magic: ['array', 'uint8', 4]
  });
  console.log(binary.read('magic'));
});