What to Know An XLSX file is a Microsoft Excel Open XML Format Spreadsheet file. Open one with Excel, Excel Viewer, Google Sheets, or another spreadsheet program. Convert one to CSV, XLS, ODS, etc ...

Microsoft released updates for Office 2008 and Office 2004 improving stability and fixing issues caused by previous updates. The company also released its Open XML converter, allowing users to ...

The Microsoft Office Open XML File Format Converter is a stand-along tool that lets users of older versions of MS Office open and edit documents created in Office 2008 for Mac or Windows 2007 Office.

As mentioned in the above paragraph, Microsoft also released its 1.0 version of the Open XML File Format Converter. If you're an Office 2004 user but are constantly getting files from your Office ...