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XLSX was developed in 2007 by the Microsoft Corporation. The file extension represents an open XML-based spreadsheet document format created by Microsoft Excel.

Functions and characteristics of the .xlsx extension

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.

File extension
xls/xlsx
Internet media type
Spreadsheet
Programs that use this format
Gnumeric
KSpread
LibreOffice Calc
Google Sheets
Zoho Sheet
Apple iWork Numbers
Microsoft Office Excel
Developer
Microsoft

FAQ

How do I view XLSX files?
How to Read Multiple Excel (xlsx) Files in PythonImport the Modules. In the first step, we are going to import the modules Path, glob, and openpyxl Read all xlsx Files in the Directory to a List. ... Create Workbook Objects (i.e., read the xlsx files) ... Work with the Imported Excel Files.Feb 16, 2020
How do I know if my file is XLS or XLSX?
Check the file extension. If it is ". xlsx" then the file was created with Excel 2007. The extension ".
What is the difference between Excel and XLSX?
XLS files are based on the Binary Interchange File Format (BIFF) and store information in binary format as per XLS File Format Specifications. ... In contrast, an XLSX file is based on Office Open XML format that stores data in compressed XML files in ZIP format.
How do I open an XLSX file without Excel?
You can also open and edit XLSX files without Excel, completely free, using WPS Office Spreadsheets, OpenOffice Calc, or LibreOffice Calc. If you're on a Mac, Apple Numbers supports XLSX files, too (but not all features will work).
Is XLSX a CSV file?
CSV files are commonly used for data exchange between platforms, making the data raw again so it can be processed by different applications. This is the most flexible data format. XLSX is the file extension for a Microsoft Excel Spreadsheet. ... This makes the data easy to re-group, combine, and re-format.
How do I create an XLSX file?
With the launch of Office 2007, Microsoft changed the default file extension to . xlsx....xlsx file format.Open the file that you want to convert in Excel. Video of the Day.Click the round "Office" button in the top left corner of the screen to open the file menu.Click "Save As."Select "Excel Workbook" from the menu.
How do I convert an XLSX file to Excel?
Save a workbook in another file formatOpen the workbook you want to save.Click File > Save As.Under Places, pick the place where you want to save the workbook. ... In the Save As dialog box, navigate to the location you want.In the Save as type list, click the file format you want.More items...
What program opens XLSX files?
xlsx file extension is a Microsoft Excel Open XML Spreadsheet (XLSX) file created by Microsoft Excel. You can also open this format in other spreadsheet apps, such as Apple Numbers, Google Docs, and OpenOffice.
Why can't I open XLSX files?
xlsx' because the file format or file extension is not valid. Verify that the file has not been corrupted and that the file extension matches the format of the file." It usually indicates the file is not compatible with the Excel version of the file that has come corrupt or damaged.