<span><<span>script</span> <span>src</span>=<span>"https://cdnjs.cloudflare.com/ajax/libs/xlsx/0.8.0/jszip.js"</span>></span><span></span><span></<span>script</span>></span>
<span><<span>script</span> <span>src</span>=<span>"https://cdnjs.cloudflare.com/ajax/libs/xlsx/0.8.0/xlsx.js"</span>></span><span></span><span></<span>script</span>></span>
<span><<span>script</span>></span><span>
<span>var</span> ExcelToJSON = <span><span>function</span>(<span></span>) </span>{

  <span>this</span>.parseExcel = <span><span>function</span>(<span>file</span>) </span>{
    <span>var</span> reader = <span>new</span> FileReader();

    reader.onload = <span><span>function</span>(<span>e</span>) </span>{
      <span>var</span> data = e.target.result;
      <span>var</span> workbook = XLSX.read(data, {
        <span>type</span>: <span>'binary'</span>
      });

      workbook.SheetNames.forEach(<span><span>function</span>(<span>sheetName</span>) </span>{
        <span>// Here is your object</span>
        <span>var</span> XL_row_object = XLSX.utils.sheet_to_row_object_array(workbook.Sheets[sheetName]);
        <span>var</span> json_object = <span>JSON</span>.stringify(XL_row_object);
        <span>console</span>.log(json_object);

      })

    };

    reader.onerror = <span><span>function</span>(<span>ex</span>) </span>{
      <span>console</span>.log(ex);
    };

    reader.readAsBinaryString(file);
  };
};
</span><span></<span>script</span>></span>

Nguồn: https://stackoverflow.com/questions/8238407/how-to-parse-excel-xls-file-in-javascript-html5