The primary file extension used for standard Excel workbooks is .xlsx.
This extension denotes a modern Excel workbook based on the Office Open XML format, which was introduced with Microsoft Excel 2007. It is the default format for saving new spreadsheets in current versions of Excel and is widely compatible across various spreadsheet software.
Understanding Excel File Extensions
While .xlsx is the most common, Excel uses several other file extensions, each serving a specific purpose. These different formats allow users to manage various aspects of their data, from basic spreadsheets to complex files with macros or specialized structures.
Here's a breakdown of common Excel file extensions:
| Format | Extension | Description
