The File Extensions Database


._XLS File Extension

  • Category: Spreadsheet Files
  • Format: Binary

What is an ._XLS file?

._XLS is Renamed Microsoft Excel Spreadsheet

An _XLS file is a Microsoft Excel spreadsheet file renamed from ".xls" to "._xls". It may have been renamed by a user on purpose or by accident or another program. _XLS files contain the contents of an .XLS file, which may include one or more worksheets, which store and display data in a table format.

You can rename an _XLS file by changing the "._xls" extension to ".xls". After renaming the file, you can open the XLS file with a variety of programs, such as Microsoft Excel and LibreOffice Calc.

_XLS files are sometimes created by email programs, specifically Windows Live Mail, when sending an XLS file via email. Windows Live Mail may rename it if the filename ends with a "." before the "." in the extension. For example, sample..xls is changed to sample._xls by the email program. This also commonly occurs with .DOC, .DOCX, and .XLSX files.

NOTE: XLS files are typically created by Microsoft Excel. However, they may also be created using another spreadsheet program, such as LibreOffice Calc or Apple Numbers.

How to solve problems with _XLS files

  • Associate the _XLS file extension with the correct application. On :
    Windows: Right click on any _XLS file and then click "Open with" > "Choose another app". Now select another program and check the box "Always use this app to open *._XLS files". Mac: Right click (or Ctrl-click) the _XLS file, then click "Open with" > "Other...". Then choose another program and check the "Always Open With" box. Linux: Right click on the file, and select "Open with" and choose another program. iPhone: Tap the file. If you do not see an app to open the file, then tap Share "Share" and choose an app. Alternatively, save the file. Then open the Files app Files app. There long-press on the file, then release your finger. You will see a black menu bar. Then tap "Share" and select an app. Android: Tap the Settings icon on your smartphone, then tap on the Apps section. There tap the Options icon in the top right-hand corner of the screen to change the default apps.
  • Update your software that should actually open ._XLS is Renamed Microsoft Excel Spreadsheet. Because only the current version supports the latest _XLS file format. Search, therefore, e.g. on the N/A manufacturer website after an available ._XLS is Renamed Microsoft Excel Spreadsheet update.
  • To make sure that your _XLS file is not corrupted or virus-infected, get the file again and scan it with antivirus software.