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., with some ...

News. Microsoft Open XML Converter Arrives for Mac. By David Nagel; 06/24/2008; Microsoft has released Open XML File Format Converter for Mac 1.0, a file translator that allows users to open, edit, ...

Microsoft’s Macintosh Business Unit released three updates for its Mac Office products. Office 2008, Office 2004 and the Open XML File Format Converter for Mac are all available from the company ...