UTF-8 encoding issue when exporting csv file in JavaScript

I use the below function to export an array to a csv files in JavaScript, but the Chinese characters become messy code with Microsoft Excel 2013 in Windows7.

I open the exported file with a notepad but it displays finely.

function arrayToCSVConvertor(arrData, reportTitle) {
    var CSV='';
    arrData.forEach(function(infoArray, index){
        var dataString = infoArray.join(",");
        dataString= dataString.split('\n').join(';');
        CSV += dataString+ "\n";

    if (CSV == '') {
        alert("Invalid data");

    //create a link and click, remove
    var link = document.createElement("a");"lnkDwnldLnk";

    //this part will append the anchor tag and remove it after automatic click

    var csv = CSV;

    var blob = new Blob([csv], { type: ' type: "text/csv;charset=UTF-8"' });//Here, I also tried charset=GBK , and it does not work either
    var csvUrl = createObjectURL(blob);

    var filename = reportTitle+'.csv';

    if(navigator.msSaveBlob){//IE 10
        return navigator.msSaveBlob(blob, filename);
                'download': filename,
                'href': csvUrl


  • Problem solved by adding BOM at the start of the csv string:

    var csv = "\ufeff"+CSV;