How do I open a .XLSX file?

What program will open XLSX files?

You can open XLSX files with Microsoft Excel in Windows and macOS. Excel is the best option for opening XLSX files because it fully supports the formatting of Excel spreadsheets, which includes images, graphs, and spacing of data fields. Excel is also available for Android and iOS devices.

How can I open a .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).

Why can't I open XLSX files?

When the Excel file is corrupted, not compatible with the Excel version, infected by the virus, or received by email, these are the common causes of the "Excel cannot open the file because the file format or file extension is not valid" problem. If any of these problems appear, you can't open your XLSX file.

How do I open an XLSX attachment?

XLSX files are normally opened using Excel applications. Regarding your concern, it could be possible that Excel app is not set as the default app for XLSX file. We recommend that you download the attachment on your computer, then launch Excel app.