A file with the XLSX file extension is a Microsoft Excel Open XML Format Spreadsheet file. It's an XML-based spreadsheet file created by Microsoft Excel version 2007 and later.What is XLS file format?
A file with the XLS file extension is a Microsoft Excel 97-2003 Worksheet file. Later versions of Excel save spreadsheet files in the XLSX format by default. XLS files store data in tables of rows and columns with support for formatted text, images, charts, and more.What is a xlsx file?
Files with the.xlsx extension are Microsoft Excel spreadsheet files that have been created using Microsoft Excel versions 2007 and later. Previous versions of Excel saved these spreadsheet documents in.xls format. The 2007 and later versions of Excel use the Office Open XML Format, creating the.xlsx extension.