XLSX was developed in 2007 by the Microsoft Corporation. The file extension represents an open XML-based spreadsheet document format created by Microsoft Excel.
This type of file is used in MS Excel, a spreadsheet app that manages data with the help of tables. Cells in such tables contain numbers or text. Formulas to simplify calculations can also be implemented here if necessary.
The .xlsx extension is a default format for creating spreadsheets in MS Office 2007 and its later versions. The main reason why this doc type was introduced was because of the growing competition from Open Office and its ODF. Therefore, the old version (XLS) was replaced by an updated one.
Among the new format’s advantages, the two key benefits are better image formatting and small file size. In fact, it’s a ZIP archive that contains numerical and textual input. The files can also contain different cell formatting, mathematical formulas, and charts.
Such documents store data in worksheets that contain cells arranged in columns and rows. The format is very useful for business operations because it helps store financial data and perform mathematical calculations.