.xlsx
Microsoft Excel Spreadsheet
Spreadsheets·application/vnd.openxmlformats-officedocument.spreadsheetml.sheet
What is a .xlsx file
The modern XML-based Excel spreadsheet format (Office 2007 and later).
How to open a .xlsx file
Microsoft ExcelLibreOffice CalcGoogle Sheets
Extension
.xlsx
Category
Spreadsheets
MIME
application/vnd.openxmlformats-officedocument.spreadsheetml.sheet
Other Spreadsheets formats
FAQ — .xlsx
What is a .xlsx file?
.xlsx is a Microsoft Excel Spreadsheet. The modern XML-based Excel spreadsheet format (Office 2007 and later).
What program opens a .xlsx file?
.xlsx files open with: Microsoft Excel, LibreOffice Calc, Google Sheets.
What is the MIME type of .xlsx?
The MIME type of .xlsx is "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet" — the identifier browsers and servers use for this format.