Convert XLS to _XLS

Understanding xls and _xls file formats

XLS is the standard file extension for Microsoft Excel spreadsheets created in versions prior to Excel 2007. These files store data in a proprietary binary format and support features like formulas, charts, and macros. _XLS is not a standard or widely recognized file format. In most cases, files with a _xls extension are simply XLS files that have been renamed, often for backup or temporary purposes, or to avoid overwriting the original file.

How to convert xls to _xls

Since _xls is not a distinct file format but rather a renamed XLS file, the conversion process is straightforward. You only need to rename the file extension from .xls to _xls. No data transformation or specialized conversion software is required.

Step-by-step conversion process

1. Locate your .xls file in your file explorer.
2. Right-click the file and select Rename.
3. Change the file extension from .xls to _xls (e.g., report.xls to report_xls).
4. Press Enter to confirm the change.

Note: Some operating systems may warn you about changing file extensions. Confirm the change if prompted.

Best software for handling xls and _xls files

Since the file content remains unchanged, any software that can open XLS files can also open _xls files if you manually select the file or change the extension back to .xls. Recommended software includes:

• Microsoft Excel – The native application for XLS files.
• LibreOffice Calc – A free alternative that supports XLS files.
• WPS Office Spreadsheets – Another free office suite compatible with XLS files.

If you need to batch rename multiple files, tools like Bulk Rename Utility (Windows) or Renamer (Mac) can help automate the process.