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Convert CSV to Excel using REST API in Node.js
// How to Convert CSV to Excel file using REST API in Node.js
const convert = async () => {
const convertApi = groupdocs_conversion_cloud.ConvertApi.fromKeys(clientId, clientSecret);
const settings = new groupdocs_conversion_cloud.ConvertSettings();
settings.storageName = myStorage;
settings.filePath = "nodejs-testing/sample-file.csv";
settings.format = "xlsx";
settings.outputPath = "nodejs-testing/sample-file.xlsx";
try {
// Create convert document request
const request = new groupdocs_conversion_cloud.ConvertDocumentRequest(settings);
await convertApi.convertDocument(request);
catch (err) {
throw err;
.then(() => {
console.log("Successfully converted CSV to XLSX file format:");
.catch((err) => {
console.log("Error occurred while converting the Excel file:", err);
// construct FileApi to download converted file
var fileApi = groupdocs_conversion_cloud.FileApi.fromConfig(config);
// create donwload file request
let request = new groupdocs_conversion_cloud.DownloadFileRequest("nodejs-testing/sample-file.xlsx", myStorage);
// download file and response type Stream
.then(function (response) {
// save file in your system directory
fs.writeFile("H:\\groupdocs-cloud-data\\sample-file.xlsx", response, "binary", function (err) { });
console.log("Expected response type is Stream: " + response.length);
.catch(function (error) {
console.log("Error: " + error.message);

You can convert CSV to Excel format programmatically on the cloud. In this article, you will learn how to convert CSV to XLSX in Node.js using REST API.

The following topics shall be covered in this article:

  1. CSV to Excel Conversion REST API and Node.js SDK
  2. Upload CSV file on the Cloud
  3. How to Convert CSV to Excel file using REST API in Node.js
  4. Download the Converted XLSX file format
// open file in IOStream from your system drive.
var resourcesFolder = 'H:\\groupdocs-cloud-data\\sample-file.csv';
// read file
fs.readFile(resourcesFolder, (err, fileStream) => {
// construct FileApi
var fileApi = groupdocs_conversion_cloud.FileApi.fromConfig(config);
// create upload file request
var request = new groupdocs_conversion_cloud.UploadFileRequest("sample-file.csv", fileStream, myStorage);
// upload file
.then(function (response) {
console.log("Expected response type is FilesUploadResult: " + response.uploaded.length);
.catch(function (error) {
console.log("Error: " + error.message);
# Import Node.js SDK in your node application from
global.groupdocs_conversion_cloud = require("groupdocs-conversion-cloud");
global.fs = require("fs");
// get clientId and clientSecret from (free registration is required).
global.clientId = "xxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx";
global.clientSecret = "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx";
global.myStorage = "test-internal-storage";
const config = new groupdocs_conversion_cloud.Configuration(clientId, clientSecret);
config.apiBaseUrl = "";
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