public void ConvertJsonToXlsxAndTriggerDownload(string jsonData)
{
    var data = JsonConvert.DeserializeObject<VoltageData>(jsonData);

    using (var package = new ExcelPackage())
    {
        var worksheet = package.Workbook.Worksheets.Add("Sheet1");

        worksheet.Cells[1, 1].Value = "Date";
        worksheet.Cells[1, 2].Value = "MeterID";
        worksheet.Cells[1, 3].Value = "Hour";
        worksheet.Cells[1, 4].Value = "Voltage";

        int row = 2;

        foreach (var record in data.Records)
        {
            string date = record.Date;

            foreach (var meterVoltage in record.MeterVoltages)
            {
                string meterId = meterVoltage.MeterID;

                if (meterVoltage.HourlyVoltages != null)
                {
                    foreach (var hourlyVoltage in meterVoltage.HourlyVoltages)
                    {
                        worksheet.Cells[row, 1].Value = date;
                        worksheet.Cells[row, 2].Value = meterId;
                        worksheet.Cells[row, 3].Value = $"{hourlyVoltage.Hour}:00";
                        worksheet.Cells[row, 4].Value = hourlyVoltage.Voltage;

                        row++;
                    }
                }
            }
        }

        // Convert Excel file to Base64 string
        byte[] fileData = package.GetAsByteArray();
        string base64String = Convert.ToBase64String(fileData);
        string fileName = "HourVoltageData.xlsx"; // Define the file name

        // Escape the base64String for use in JavaScript
        string escapedBase64String = UnityWebRequest.EscapeURL(base64String);

        // JavaScript code to trigger download
        string jsFunction = $@"
            function triggerFileDownload(fileName, base64Data) {{
                function base64ToBlob(base64, type = 'application/octet-stream') {{
                    const binaryString = atob(base64);
                    const len = binaryString.length;
                    const bytes = new Uint8Array(len);
                    for (let i = 0; i < len; i++) {{
                        bytes[i] = binaryString.charCodeAt(i);
                    }}
                    return new Blob([bytes], {{ type }});
                }}

                const blob = base64ToBlob(base64Data, 'application/vnd.openxmlformats-officedocument.spreadsheetml.sheet');
                const link = document.createElement('a');
                link.href = URL.createObjectURL(blob);
                link.download = fileName;
                document.body.appendChild(link);
                link.click();
                document.body.removeChild(link);
            }}
            triggerFileDownload('{fileName}', '{escapedBase64String}');
        ";

        Application.ExternalEval(jsFunction);
    }

    Debug.Log("Excel file has been converted and download triggered.");
}