An xlsx file extension is used by Microsoft Excel for its workbooks (spreadsheets) in Office Open XML format. XLSX is the latest spreadsheet format used by Excel with adoption of XML formatting first used in Office 2000. While older xls files were binary in nature, xlsx spreadsheets are using somewhat altered XML scheme.

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Software that works with xlsx file extension

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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

The xlsx file extension is associated with Microsoft Excel, one of the most popular and powerful tool for creating spreadsheets, graphs and much more.

The xlsx files are used in Microsoft Excel 2007/2010/2013/2016 or Office 365 on-line service for workbooks and spreadsheet document files as well as Excel for Android, iOS and Windows Phone platforms.

They serve the same purpose as the xls Microsoft Excel 97 to 2003 Workbook files, but use the new file extensions and file formats for Excel Spreadsheets based on Office Open XML format developed by Microsoft.

XLSX format uses ZIP compression for smaller file sizes.

MIME-type used for Microsoft Excel .xlsx spreadsheets:
application/vnd.openxmlformats-officedocument.spreadsheetml.sheet

The default software associated to xlsx file type:

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 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.

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 XLSX files:

Use Microsoft Excel 2007 and higher or similar office software to open the .xslx files.
If you have older Microsoft Office Suite version than version 2007, you can download import (open)/export (save) filters from Microsoft website - 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 file with extension XLSX:

If you have older Microsoft Office Suite version than version 2007, you can download import/export filters from Microsoft website - Microsoft Office Compatibility Pack for Word, Excel, and PowerPoint 2007 File Formats.
Microsoft Excel supports some other file formats, If you want to save workbook to another format in Excel, you can choose menu File > Save as...

Also there are available many third party apps and office suites, which allows users to convert xlsx file to other spreadsheet formats.

Find conversions from xlsx file:

xlsx to accdb

xlsx to arff

xlsx to doc

xlsx to docx

xlsx to mdb

xlsx to numbers

xlsx to xlsb

Find converter to xlsx file type:

gsheet to xlsx

jpg to xlsx

numbers to xlsx

ods to xlsx

spb 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 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 ableto perform the specified software action, such as opening, editing or converting xlsx files.

  • Open xlsx file
  • Edit xlsx file
  • Convert xlsx file
  • Create xlsx file
  • Recover xlsx file
  • Others xlsx file

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

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

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

On-line services:

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

Windows Phone / Windows 10 Mobile:

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