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Microsoft Excel Open XML workbook and spreadsheet
File type: Microsoft Office file, Spreadsheet and workbook file
Files with xlsx extension are s used by Microsoft Excel for its workbooks (spreadsheets) in Office Open XML format. XLSX is the latest spreadsheet format used by Excel with the adoption of XML formatting first used in Office 2007. While older xls files were in proprietary binary file format, xlsx spreadsheets use a somewhat altered XML scheme.
File type category:
Microsoft Office file
Spreadsheet and workbook file
Date updated: July 25, 2025
File extension xlsx is associated with Microsoft Excel, one of the most popular and powerful software for creating spreadsheets, graphs, charts, and more.
The xlsx files are used in Microsoft Excel 2007/2010/2013/2016/2019/2021 or Office 365 online subscription service for workbooks and spreadsheet document files. Microsoft Excel is available for Windows or MacOS, as well as Excel for Google Android and Apple iOS.
They serve the same purpose as the Microsoft Excel up to version 2003 Workbook files (xls file extension) but use the new file extensions and file formats for Excel Spreadsheets based on Office Open XML format developed by Microsoft. XLSX file format is supported by many Office suites today.
XLSX format uses ZIP compression for smaller file sizes.
MIME-type used for Microsoft Excel .xlsx spreadsheets:
application/vnd.openxmlformats-officedocument.spreadsheetml.sheet
Use Microsoft Excel 2007 and higher or similar office software to open the .xslx files.
Suppose you have an older Microsoft Office Suite version than version 2007. You can download import (open)/export (save) filters - Microsoft Office Compatibility Pack for Word, Excel, and PowerPoint 2007 file formats.
Many third-party apps, such as Apache OpenOffice, LibreOffice, etc., can open and edit xlsx files.
Suppose you have an older Microsoft Office Suite version than version 2007. You can download import/export filters - Microsoft Office Compatibility Pack for Word, Excel, and PowerPoint 2007 File Formats.
Microsoft Excel supports some other file formats; If you want to save the workbook to another format in Excel, you can choose the menu File > Save as...
Many third-party apps and office suites allow users to convert xlsx files to other spreadsheet formats.
Software applications that can open xlsx files:
Microsoft Windows
Apple macOS / Mac OS X
On-line services
Apple iOS
Google Android
Software applications that can edit xlsx files:
Microsoft Windows
Apple macOS / Mac OS X
On-line services
Apple iOS
Google Android
Software capable of saving xlsx files:
Microsoft Windows
Apple macOS / Mac OS X
On-line services
Apple iOS
Google Android
Software apps that create xlsx files:
Microsoft Windows
Apple macOS / Mac OS X
Multiplatform
On-line services
Apple iOS
Google Android
Software apps that convert xlsx files:
Microsoft Windows
Apple macOS / Mac OS X
Multiplatform
Software apps that import xlsx files:
Microsoft Windows
Multiplatform
Software apps that export xlsx files:
Microsoft Windows
Multiplatform
Software apps that recover xlsx files:
Microsoft Windows
Software apps that print xlsx files:
Microsoft Windows
Apple macOS / Mac OS X
Multiplatform
Software applications that handle other tasks involving xlsx files:
Microsoft Windows
Apple macOS / Mac OS X
Multiplatform
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