A file with the file extension .xlsx is a Microsoft Excel Open XML spreadsheet (XLSX) file created by Microsoft Excel. You can also open this format in other spreadsheet applications such as Apple Numbers, Google Docs, and OpenOffice. They are saved as a compressed zip file containing a number of other files used to open the document.
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What is an XLSX file?
XLSX files are files used in Microsoft Excel, a spreadsheet application that uses tables to organize, analyze, and store data. Each cell can contain text or numeric data, including mathematical formulas.
XLSX was first introduced with Microsoft Office 2007 in the Office Open XML standard and is the standard format for creating a spreadsheet with modern versions of Excel. Microsoft has introduced this open format mainly due to increasing competition from Open Office and its Open Document Format (ODF). The XLXS format replaced the proprietary XLS format previously used by Excel.
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How do I open an XLSX file?
Because XLSX files have been standardized, you can open them in many applications on different platforms. Although Windows opens it natively only if you have a copy of Microsoft Office 2007 or later, you can download a third-party open source application such as Apache OpenOffice or LibreOffice to open your files.
Mac users just need to double-click the file and it opens in the Apple Numbers application.
If you prefer to save, open, and edit all Office Open XML files in the cloud, you can do so by uploading your document via Excel Online or Google Sheets.
Alternatively, as a Chrome user, you can download the Office Editing extension for Google Docs, Sheets, and Slides (an official Google extension) for your Google Chrome browser. You can upload any XLSX file directly from your local hard drive to Google Drive by dragging and dropping it onto any Chrome tab.
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