.xlsx — Microsoft Excel Spreadsheet
Microsoft Excel's modern XML-based spreadsheet format, the standard for tabular data and calculations in Office.
Safety guidance (not a guarantee)
This format can contain macros or embedded scripts that run code when enabled. Keep macros disabled unless you trust the source and specifically expect them.
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Frequently asked questions
What is a .xlsx file?
Microsoft Excel's modern XML-based spreadsheet format, the standard for tabular data and calculations in Office.
Can I edit a .xlsx file?
Yes — .xlsx files are commonly editable with software such as Microsoft Excel.
Does having a .xlsx extension mean the file is safe?
No single extension can guarantee that. This format can contain macros or embedded scripts that run code when enabled. Keep macros disabled unless you trust the source and specifically expect them. Always consider where the file came from, not just its name.
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