This script will convert a CSV file to JSON. That's it! Usage: csvToJson.go( 'PATH_TO_CSV' );

csv-to-json.js

var csvToJson = {
  json: [],
  headers: [],

  go: function(url) {
    var _this = this;

    // AJAX call to get CSV data.
    $.ajax({
      type: "GET",
      url: url,
      dataType: "text",
      async: false,

      success: function(data) {
          _this.processData(data);
      }
    });

    return this.json;
  },

  /*
   * Function: processData
   *     Converts data from CSV into JSON
   * 
   * Input: String (CSV data)
   */

  processData: function(data) {
    // Split the data file by rows; /\r/ is end of record for .csv files
    var rows = data.split(/\r/);

    this.getHeaders(rows[0]);
    this.convertRows(rows);
  },

  /*
   * Function: getHeaders
   *     Gets the headers from the CSV to be used as keys in the JSON object.
   * 
   * Input: String (first row of CSV)
   * Output: Array
   */

  getHeaders: function(row) {
    this.headers = row.split(',');
  },

  /*
   * Function: convertRows
   *     Converts all rows of a CSV (from an array of its rows) to JSON
   *
   * Input: Array (rows)
   * Output: Array of objects
   */

  convertRows: function(rows) {
    for (var i=1; i<rows.length; i++) {
      var row = rows[i].split(',');

      var obj = this.convertRow(row, i);

      this.json.push(obj);
    }
  },

  /*
   * Function: convertRow
   *     Converts a single row of a CSV into an object.
   *
   * Input: Array (the row), ID (which row)
   * Output: Object
   */

  convertRow: function(row, id) {
    // Setup the object with a unique ID.
    var obj = { 'id': id };

    // The rest of the items in the object are generated based on the headers (this.headers).
    for (var i=0; i<this.headers.length; i++) {
      obj[ this.headers[i] ] = row[i];
    }

    return obj;
  }
};