Java API to convert XLS to XLTX

Java library to convert XLS to XLTX

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

Convert a XLS file to XLTX in Java

API Request:

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

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

// For complete examples and data files, please go to
    public class Conversion {
        public static void main(String[] args) {
            String name =  "Book1.xls";
            String format = "xltx";
            String password = null;
            String outPath = null;
            String destFile = "DestFile.xltx";
            try {
                CellsApi cellsApi = new CellsApi(System.getenv("ProductClientId"), System.getenv("ProductClientSecret"));
                File response = cellsApi.cellsWorkbookPutConvertWorkbook(new File(name), format, password, outPath, null,null);            
                        response.renameTo(new File(destFile));
            catch(Exception exception )

How to use Java API to convert XLS to XLTX

  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. Maven 2.2.0 or newer
  2. Java(TM) SE Runtime Environment