_XLS File Type

- The quick facts

What are _XLS files and how to open them

Are you having problems opening a _XLS file or just wondering what they contain? We explain what these files are used for and show you software that we know can open or otherwise handle your files.

What is a _XLS file?

The ._xls file extension is used for temporary spreadsheet files in the XLS file format. These _XLS files are also known as Microsoft Excel temporary files. Some Webmail providers and email client programs convert .xls spreadsheet attachments into ._xls files, in order to protect users against possibly malicious macros stored in the attached XLS spreadsheet files.These _XLS files may contain Microsoft Excel data like financial and accounting details, text and other multimedia objects. However, Microsoft Excel cannot open and view the content of these .xls files, unless the underscore () is deleted from the file extension.For example, 1._xls should be changed to 1.xls in order for Microsoft Excel to be capable of opening and editing these spreadsheets. Once this has been done, all versions of Microsoft Excel can be used to open and edit these spreadsheets. Microsoft Excel versions are available in Windows PCs, Mac OS X computers, Android devices and iOS mobile gadgets.

How to open _XLS files

Important: Different programs may use files with the _XLS file extension for different purposes, so unless you are sure which format your _XLS file is, you may need to try a few different programs.

While we have not verified the apps ourselves yet, our users have suggested 3 different _XLS openers which you will find listed below.

Last updated: December 15, 2021

Suggest another file format using extension _XLS

While we know of one file format using the ._XLS file extension, there may be more. It is widespread that different programs use files with the same file extension for very different types of data. Please let us know if you are aware of a different kind of ._XLS file.

Various apps that use files with this extension

These apps are known to open certain types of _XLS files. Remember, different programs may use _XLS files for different purposes, so you may need to try out a few of them to be able to open your specific file.

Microsoft OfficeMicrosoft OfficeUser submitted
Adobe AcrobatAdobe AcrobatUser submitted
Jw_cadJw_cadUser submitted
We have not verified any software that we know for certain will work with _XLS-files on Mac. If you know one, please use the 'Suggest a program' link below and tell us about it!
We have not verified any web services that we know for certain will work with _XLS-files. If you know one, please use the 'Suggest a program' link below and tell us about it!