Save a Workbook in another File Format When you save an Excel 2013 Workbook, by default it saves in the .xlsx format. Excel 2013 supports saving in other formats, but whenever you save a workbook in another file format, some of its formatting, data, and features might not be saved. File Formats (File Types) that are supported in Excel 2013 − Excel File Formats Text File Formats Other File Formats Excel File Formats Format Extension Description Excel Workbook .xlsx The default XML-based file format for Excel 2007-2013. Cannot store Microsoft Visual Basic for Applications (VBA) macro code or Microsoft Office Excel 4.0 macro sheets (.xlm). Strict Open XML Spreadsheet .xlsx An ISO strict version of the Excel Workbook file format (.xlsx). Excel Workbook (code) .xlsm The XML-based and macro-enabled file format for Excel 2007-2013. Stores VBA macro code or Excel 4.0 macro sheets (.xlm) Excel Binary Workbook .xlsb The binary file format (BIFF12) for Excel 2007-2013. Template .xltx The defa
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