File Type Excel Spreadsheet IconExcel Spreadsheet
File Format Proprietary (Microsoft)
Usage Open manually
Rank ★ ★ ★  Common

An XLS file is a spreadsheet created with Excel 2003 or earlier for Windows or Excel 2003 or earlier for Macintosh systems. It contains data stored in cells, which are organized into rows and columns. Each spreadsheet may also contain multiple sheets.

IMPORTANT: Beginning with Excel 2007, spreadsheets are saved in the OpenXML format and use the .XLSX extension.

Info About Microsoft Excel

Excel is a popular spreadsheet program. It is widely used by businesses, but is also available to consumers. Excel includes advanced spreadsheet capabilities and supports complex formulas, which can be used to calculate the values of individual cells. It is commonly used to create and store "sheets" of data in an organized format.

Open With

IconMicrosoft Excel

IconMicrosoft Excel Viewer

IconCorel Quattro Pro


IconMicrosoft Excel for Mac

IconApache OpenOffice

IconPlanamesa NeoOffice


IconApache OpenOffice



Updated July 21, 2009