Convert XLS (Excel) to XLTX
Convert XLS spreadsheet documents to XLTX format online and free.
Select any XLS file from your device to start uploading it.
Choose any XLS to XLTX converter tools for a customized conversion, and click Convert.
Let the conversion process finish, then download your XLTX spreadsheet document.
To change XLS format to XLTX, upload your XLS file to proceed to the preview page. Use any available tools if you want to edit and manipulate your XLS file. Click on the convert button and wait for the convert to complete. Download the converted XLTX file afterward.