Old Excel 97-2003 files still turn up everywhere. Open them here, along with binary .xlsb and OpenDocument .ods files.
- .xls
- .xlsb
- .xlsm
- .ods
XLS, XLSX and XLSB: what is the difference?
- .xls is the old binary format used before 2007.
- .xlsx is the modern XML-based format.
- .xlsb is a compact binary format for very large workbooks.
- .ods is the OpenDocument spreadsheet from LibreOffice.
Convert XLS to XLSX
Open the file, then use Export to save the current sheet as a new .xlsx or as CSV. Formatting is not carried over, only the data.
Frequently asked questions
Can I open .xls without Excel?
Yes, this viewer reads it directly in the browser.
Does it keep formulas?
It shows formulas when you turn on Show formulas.