NodeJS API to convert XLTX to XLS

NodeJS library to convert XLTX to XLS

Use Cells Conversion REST API to create customized spreadsheet workflows in NodeJS. This is a professional solution to convert XLTX to XLS and other document formats online using NodeJS.

Convert a XLTX file to XLS in NodeJS

API Request:

Converting file formats from XLTX to XLS is a complex task. All XLTX to XLS format transitions is performed by our NodeJS SDK while maintaining the source XLTX spreadsheet's main structural and logical content. Our NodeJS library is a professional solution to convert XLTX to XLS files online. This Cloud SDK gives NodeJS developers powerful functionality and perfect XLS output.

Code example in NodeJS using REST API to convert XLTX to XLS format

// For complete examples and data files, please go to
    const { CellsApi, CellsWorkbook_PutConvertWorkbookRequest } = require("asposecellscloud");
    const localPath = "../TestData/source/";
    var fs = require('fs');
    var path = require('path');
    const cellsApi = new CellsApi(process.env.ProductClientId, process.env.ProductClientSecret);
    var req = new CellsWorkbook_PutConvertWorkbookRequest({
        file: fs.createReadStream(localPath + "datasource.xltx"),
        format: "xls",
        .then((result) => {

How to use Node API to convert XLTX to XLS

  1. Create an account at Dashboard to get free API quota & authorization details
  2. Initialize CellsApi with Client Id, Client Secret, Base URL & API version
  3. Call cellsWorkbookPutConvertWorkbook method to get the resultant stream

System Requirements

  1. node v6.17.1 or newer