How to Open an XLS File
Open an XLS workbook with Microsoft Excel or LibreOffice Calc. XLS is the older Excel binary workbook format, distinct from XLSX; use a spreadsheet application to convert it rather than changing its extension.
Choose what you need
Open an XLS workbook on Windows, Mac or Linux
- Use an installed Microsoft Excel or LibreOffice Calc application.
- Choose File → Open and select the XLS file.
- Inspect all worksheets, formulas and charts.
- Save any changes to a separate file until you have checked compatibility.
If the workbook contains macros or external links, keep them disabled unless you understand and trust their purpose. Opening a spreadsheet for inspection does not require enabling its automation.
Convert XLS to XLSX, CSV or PDF
For an editable modern workbook, use Save As and choose XLSX. XLSX does not retain VBA macros; if you need supported macros, select an appropriate macro-enabled format and check compatibility. For plain tabular data, save the needed sheet as CSV, understanding that CSV does not preserve a complete multi-sheet workbook or its formatting.
Use a spreadsheet PDF export when the goal is a printable view. Check the print area and page breaks before sending it. Always inspect the exported file rather than assuming a successful save preserved every feature.
XLS will not open or a viewer says the format is wrong
Confirm that the file is complete and really came from a spreadsheet export. Some applications produce non-XLS contents with an XLS filename, and a filename mismatch can trigger warnings. Ask for a new correctly formatted export instead of repeatedly changing the suffix.
The XLSX browser tool on this website reads XLSX packages, not legacy XLS binaries. Use a desktop spreadsheet application for the XLS opening and conversion routes described here.
Frequently asked questions
Can I rename XLS to XLSX?
No. Open the XLS in a compatible spreadsheet application and save an XLSX copy. The formats have different structures.
Will XLSX preserve macros from XLS?
XLSX is not a VBA macro-enabled format. Choose an appropriate format and verify compatibility if the workbook needs macros.
Sources and further reading
Opening routes checked against the references below on October 11, 2026. Device menus, software support and protection policies can change.