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.XLSX File Extension

Windows user? Open .XLSX files for FREE with File Viewer Lite

File TypeMicrosoft Excel Open XML Spreadsheet

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CategorySpreadsheet Files


This file is saved in a zipped format. You can view the contents by unzipping it with a file decompression program.


Spreadsheet created with Microsoft Excel, a program used to create spreadsheets; stores data in worksheets, which contain cells arranged in a grid of rows and columns; may also contain charts, mathematical functions, styles, and formatting; commonly used to store financial data and to create simple or complex mathematical models.

More Information

Each cell in an XLSX spreadsheet may be formatted individually. For example, cells may have a number, text, currency, or other format as well as color, border style, custom font, and size. Cells may reference other cells to compute a resulting value.

XLSX files are created using the Open XML standard, which was introduced in Microsoft Office 2007. They are stored as a compressed Zip archive, which contains a collection of individual files. The archive includes the file [Content_Types].xml, which describes the spreadsheet, and an XML file for each worksheet within the spreadsheet.

NOTE: XLSX files can be opened in Excel 2007 or later. They are also backwards compatible with earlier versions of Excel via Open XML component support.

Common XLSX Filenames:

Workbook1.xlsx - The default filename Microsoft Excel gives to new workbooks beginning with Excel 2007.

Program(s) that open .XLSX files
Microsoft Windows LogoWindows
File Viewer Lite
Microsoft Excel 2013
OxygenOffice Professional
Corel WordPerfect X7
Apache OpenOffice
Mac OS X LogoMac OS
Microsoft Excel 2011
Apple Numbers 3.5
Apache OpenOffice
Planamesa NeoOffice
Linux LogoLinux
OxygenOffice Professional
Apache OpenOffice
Web LogoWeb
Google Drive
iOS LogoiOS
MobiSystems OfficeSuite Pro
Google Drive
Android LogoAndroid
Kingsoft WPS Office for Android
MobiSystems OfficeSuite Pro
Google Drive
Updated 6/22/2015