What is a XLSX file?
XLSX (Office Open XML Spreadsheet) is the current Excel workbook format with sheets, formulas, charts and formatting. It was introduced in 2007 by Microsoft (ECMA-376).
What XLSX is good at
- Holds many sheets, formulas and charts
- Supported by Excel, Google Sheets and LibreOffice
- Compact and reliable
Where XLSX falls short
- Not human-readable
- Macros need the XLSM variant
When to use XLSX
- Budgets and financial models
- Reports with several sheets
- Sharing spreadsheets
Where XLSX files open
XLSX files open in Microsoft Excel, Google Sheets, LibreOffice Calc, Numbers.
XLSX compared with CSV
XLSX or CSV? XLSX is best for budgets and financial models. CSV is best for importing data into databases and apps. Convert XLSX to CSV or convert CSV to XLSX.
Frequently asked questions
What is a XLSX file?
XLSX (Office Open XML Spreadsheet) is the current Excel workbook format with sheets, formulas, charts and formatting. It was introduced in 2007 by Microsoft (ECMA-376).
What are the advantages of XLSX?
Holds many sheets, formulas and charts; supported by excel, google sheets and libreoffice; compact and reliable.
What are the drawbacks of XLSX?
Not human-readable; macros need the xlsm variant.
What programs open XLSX files?
XLSX files open in Microsoft Excel, Google Sheets, LibreOffice Calc, Numbers.
How do I convert a XLSX file?
Choose the XLSX converter you need from the list on this page, drop in your file and press Convert. You get your new file in seconds, free and without sign-up.