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.XLS File Extension

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Excel Spreadsheet Icon
File TypeExcel Spreadsheet
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Rare Uncommon Average Common Very Common
CategorySpreadsheet Files
File Format Description

Spreadsheet created by Microsoft Excel, the most widely-used spreadsheet program; stores data in a table with rows and columns; table cells may contain manually entered data or the results computed from the data of other cells; often used to create charts and graphs.

NOTE: Excel 2007 and later saves spreadsheets in the OpenXML format with the .XLSX file extension.

Common XLS Filenames:

Workbook1.xls - The default filename Microsoft Excel gives to new spreadsheets prior to Excel 2007, which creates new spreadsheets with the Workbook1.xlsx filename.

Program(s) that open .XLS files
Updated 8/3/2015