What is XAR? What Opens a XAR? File Format List from WhatIs.com

File Extension

XAR File Format

Microsoft Excel auto-save files

The XAR file extension is used by Microsoft Excel for the auto-saving feature that has been part of the software since the 2007 version. Auto-saving enables the user to recover a file after suffering a computer crash, power failure, and other unforeseen incident.

The XAR file extension is also associated with Corel Xara drawing files.


Learn more about XAR files: 

See questions and answers about working with Excel.

This was last updated in September 2010
Editorial Director Margaret Rouse

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