Excel Spreadsheet (.xlsx)

Frequently asked questions

What is a .xlsx file?

XLSX is the Microsoft Excel workbook format, storing rows, columns, formulas and multiple sheets as zipped XML. Excel, Google Sheets, LibreOffice and Numbers can open it.

What is Excel Spreadsheet good for?

Excel Spreadsheet works well for tables, budgets and data lists, calculations with formulas, moving data between apps.

What are the downsides of Excel Spreadsheet?

Formulas and charts may not survive every conversion Large workbooks can be slow to open

Can I convert Excel Spreadsheet in FileLab?

Excel Spreadsheet isn't yet supported for in-browser conversion here — it typically needs specialized desktop software to open or produce reliably.