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.

Detailed description

Software that open xlsx file

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XLSX file extension - Microsoft Excel Open XML workbook and spreadsheet

What is xlsx file? How to open xlsx files?

File type specification:

Microsoft Office file type icon Microsoft Office file type

Spreadsheet and workbook file type icon Spreadsheet and workbook file type

xlsx file icon: xlsx filetype icon

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

Updated: March 8, 2024

The default software associated to open xlsx file:

Microsoft Excel icon

Microsoft Corporation logoMicrosoft Excel  Microsoft Windows software

Company or developer:
Microsoft Corporation

A popular spreadsheet application distributed with Microsoft Office suite, Excel is offers calculating, contains graphing tools, pivot tables and own programming language based on Visual Basic.

Excel supports charts, graphs or histograms generated from specified groups of cells. Excel also can change data between other Microsoft Office applications. It is available for Microsoft Windows, Mac OS X (macOS) and various mobile platforms.

Microsoft Office icon

Microsoft Corporation logoMicrosoft Office  Microsoft Windows software

Company or developer:
Microsoft Corporation

Microsoft Office is popular productivity suite for Microsoft Windows. Microsoft Office contains a set of applications and services used to work with documents (Microsoft Word), spreadsheets (Microsoft Excel), presentations (Microsoft PowerPoint), databases (Microsoft Access) etc..

Microsoft Office can be also used to manage e-mail accounts, tasks, calendars and contacts (Microsoft Outlook). 

Microsoft Excel for Mac icon

Microsoft Corporation logoMicrosoft Excel for Mac  Apple macOS / Mac OS X software

Company or developer:
Microsoft Corporation

Microsoft Excel for Mac is popular spreadsheet application used to analyze, organize and manage data and lists. It is able to create visually rich datasheets and tables with icons, data bars and color scales. Microsoft Excel for Mac is fully compatible with Microsoft Excel for Windows.

Microsoft Office for Mac icon

Microsoft Corporation logoMicrosoft Office for Mac  Apple macOS / Mac OS X software

Company or developer:
Microsoft Corporation

Microsoft Office for Mac is popular office suite that contains a set of applications and services used to work with documents (Microsoft Word), spreadsheets (Microsoft Excel), presentations (Microsoft Powerpoint) and manage e-mail accounts, tasks, calendars and contacts (Microsoft Outlook).

Microsoft 365 icon

Microsoft Corporation logoMicrosoft 365  Multiplatform software

Company or developer:
Microsoft Corporation

Microsoft 365 is a subscription-based suite offering Office apps (Word, Excel, PowerPoint, Outlook), cloud services, and advanced security. It enhances productivity, supports real-time collaboration, and ensures data protection, catering to individual, business, and enterprise needs for a modern digital workspace.

Office 365 icon

Microsoft Corporation logoOffice 365  Multiplatform software

Company or developer:
Microsoft Corporation

Office 365 is a subscription-based service that gives users access to several services and apps from Microsoft Office. It is available some types of subscription editions (for Home, Education, Business and Enterprise users) available for Microsoft Windows and Apple macOS and all major mobile platforms.

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Help how to open:

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.

How to convert:

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.

Find conversions from xlsx file:

xlsx to arff

xlsx to db

xlsx to mdb

xlsx to mpp

xlsx to numbers

xlsx to sav

xlsx to xlsb

Find converter to xlsx file type:

gsheet to xlsx

jpg to xlsx

numbers to xlsx

ods to xlsx

rpt to xlsx

wk4 to xlsx

xlsb to xlsx

File identification strings:

HEX code: 50 4B 03 04
ASCII code: PK

Related links:

Microsoft Office Compatibility Pack for Word, Excel, and PowerPoint 2007 File Formats

List of software applications associated to the .xlsx file extension

Recommended software programs are sorted by OS platform (Windows, macOS, Linux, iOS, Android etc.)
and possible program actions that can be done with the file: like open xlsx file, edit xlsx file, convert xlsx file, view xlsx file, play xlsx file etc. (if exist software for corresponding action in File-Extensions.org's database).

Hint:
Click on the tab below to simply browse between the application actions, to quickly get a list of recommended software, which is able to perform the specified software action, such as opening, editing or converting xlsx files.

Software that open xlsx file - Microsoft Excel Open XML workbook and spreadsheet

Programs supporting the exension xlsx on the main platforms Windows, Mac, Linux or mobile. Click on the link to get more information about listed programs for open xlsx file action.

Microsoft Windows:

Main software associated with xlsx file by default:
Microsoft Excel small icon Microsoft Excel
Other suggested software:
Corel Quattro Pro small icon Corel Quattro Pro
Ability Spreadsheet small icon Ability Spreadsheet

Apple macOS / Mac OS X:

Main software associated with xlsx file by default:
Microsoft Excel for Mac small icon Microsoft Excel for Mac
Other suggested software:
Numbers for Mac small icon Numbers for Mac

Multiplatform:

Main software associated with xlsx file by default:
Microsoft 365 small icon Microsoft 365
Other suggested software:
Apache OpenOffice Calc (OpenOffice.org Calc) small icon Apache OpenOffice Calc (OpenOffice.org Calc)
LibreOffice Calc small icon LibreOffice Calc

On-line services:

Apple iOS (iPhone, iPad, iPod Touch devices):

Windows Phone / Windows 10 Mobile:

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