Spreadsheets · .xlsx
What Is an XLSX File?
A .xlsx file is the standard Microsoft Excel spreadsheet format.
- Extension
- .xlsx
- Full name
- Microsoft Excel workbook (Office Open XML)
- Type
- Spreadsheet
- MIME type
- application/vnd.openxmlformats-officedocument.spreadsheetml.sheet
- Developed by
- Microsoft (2007), ISO/IEC 29500 standard
Free XLSX Tools
These run in your browser. Your XLSX files are never uploaded.
About XLSX Files
XLSX is Excel's default format since 2007. A workbook can contain many sheets with up to 1,048,576 rows and 16,384 columns each, along with formulas, formatting, charts, pivot tables and images. Inside, the file is a ZIP archive of XML parts. Google Sheets, LibreOffice Calc, Numbers and many other apps read and write XLSX. Workbooks with macros use the .xlsm extension, because plain XLSX files can't store macros.
How to Open an XLSX File
- Windows & Mac
- Open it in Microsoft Excel, LibreOffice Calc, Numbers or WPS Office.
- Any device
- Upload it to Google Drive and open it with Google Sheets, or use Excel on the web for free.
- iPhone & Android
- Use the free Excel, Google Sheets or Numbers app.
XLSX File Questions
How do I convert XLSX to CSV?
Use the Excel to CSV tool on this site. It exports every sheet as its own CSV file, without uploading the workbook.
How can I open XLSX without Excel?
Google Sheets, Excel on the web, LibreOffice Calc and Numbers are all free.