What is the default extension for excel workbook files

The default extensions of Excel workbook files are ".xls" and ".xlsx". xls is the extension used before the 2007 version, and xlsx is the extension after. xlsx is a compressed file format based on the "Office Open XML" standard, replacing its previous proprietary default file format.

The operating environment of this tutorial: Windows 7 system, Microsoft Office Excel 2007 version, Dell G3 computer.

The default extensions of Excel workbook files are .xls (versions before office 2007) and .xlsx.

xls is the extension used before the 2007 version of Microsoft Office EXCEL. xlsx is the extension of Microsoft Office EXCEL 2007/2010/2013/2016/2019 documents.

xlsx The compressed file format based on the Office Open XML standard replaces its previous proprietary default file format, adding the letter "x" after the traditional filename extension. Any word processing software that can open xls files can convert the document into xlsx files. xlsx files take up less space than xls files.

Extended information:

When users of officeOffice 2000, XP, 2003 try to open files in .xlsx or .docx format , often fails, which is due to incompatibility with lower versions. The above users can open this type of file on the system where the file was generated (office 2007) before receiving or copying this type of file. File>Save As> 2000~2003 format documents.

In addition, Microsoft has launched an Office compatibility patch. By applying this compatibility patch, users of Office 2000, XP, and 2003 can now open, edit, and save new files used in Word, Excel, and PowerPoint 2007. format document.

This compatibility patch can also be used with Office Word Viewer 2003, Excel Viewer 2003 and PowerPoint Viewer 2003 to view files saved in the new format.

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