.XLS file extension
To open .XLS files on Windows, right-click the .XLS file and choose 'Open with'.
.XLS files are spreadsheet files primarily opened with Microsoft Excel. To open them, use Excel or a compatible app on your device.
Last updated: March 19, 2026 · Reviewed by Julian Stricker
Open on your device
Choose your operating system for a dedicated step-by-step opening guide.
How to open .XLS files
Use these platform-specific instructions to open .XLS files safely.
Windows
- Right-click the .XLS file and choose 'Open with'.
- Select Microsoft Excel or another compatible application.
Mac
- Control-click the .XLS file and choose 'Open With'.
- Select Microsoft Excel or an alternative compatible app.
Linux
- Right-click the .XLS file and select 'Open With'.
- Choose LibreOffice Calc or another supported application.
iOS
- Tap the .XLS file in the Files app.
- Select 'Open in' and choose a compatible app like Microsoft Excel or Numbers.
Android
- Tap the .XLS file in your file manager.
- Select an app such as Microsoft Excel or Google Sheets to open it.
Security notes
- Only open .XLS files from trusted sources.
- Be cautious of files containing macros; they can execute harmful code.
- Use antivirus software to scan files before opening.
Recommended antivirus software
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Can't open this file?
These are the most common causes and fixes when .XLS files fail to open.
Common reasons
- File does not open
- File opens with incorrect formatting
Fix steps
- Ensure a compatible app is installed and up to date.
- Check the file's integrity and source.
- Try opening it with a different application.
OS-specific troubleshooting
Convert .XLS to other formats
Use conversion tools to change .XLS files into formats your software supports.
What is a .XLS file?
.XLS is a file format for spreadsheets created by Microsoft Excel, part of the Microsoft Office suite. It stores data in a tabular format and supports various features like formulas, charts, and macros.
Background
.XLS files are a legacy format for Microsoft Excel spreadsheets, introduced with Excel 97 and used until Excel 2003. They are binary files that store data in rows and columns, making them ideal for data analysis, financial modeling, and record-keeping. With the release of Excel 2007, the newer .XLSX format was introduced, which is based on XML and offers better data recovery and reduced file size. Despite the shift to .XLSX, .XLS remains in use due to compatibility with older systems and software. Users should be aware that .XLS files can contain macros, which are powerful but can pose security risks if sourced from untrusted origins.
Common MIME types: application/vnd.ms-excel
Further reading
Authoritative resources for more details on the .XLS format.
Common .XLS issues
File does not open
The file may not open if the necessary application is missing or the file is corrupted.
- Ensure a compatible app is installed and up to date.
- Check the file's integrity and source.
- Try opening it with a different application.
File opens with incorrect formatting
This can occur if the file is opened in an incompatible application.
- Use Microsoft Excel for the best compatibility.
- Check for software updates or try another app.
FAQ
Can I convert .XLS to .XLSX?
Yes, open the .XLS file in Excel and use 'Save As' to convert it to .XLSX.
Is .XLS still supported?
Yes, but newer formats like .XLSX offer better features and security.
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