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XLSX files have replaced old Excel files in XLS format. We will provide you with step-by-step instructions on how to easily open these files in Microsoft Excel.

XLSX file format was introduced in 2007 and uses the Open XML standard adapted by Microsoft back in 2000. Previous to XLSX, the common file format used was XLS that was pure binary file format.

An XLSX file is an Excel spreadsheet created by Microsoft Excel or another spreadsheet program XLSX files are commonly used to store financial data and to save simple or complex mathematical...

XLSX Microsoft Excel Open XML Spreadsheet. XLSX is well-known format for Microsoft Excel documents that was introduced by Microsoft with the release of Microsoft Office 2007.