An xltx file is known as a Microsoft Office Excel 2007 Template. The xltx file is actually a template created by Microsoft Excel. Microsoft Excel is a program commonly used for creating spreadsheets. A xltx may contain many common settings which Microsoft Excel uses to create an xlsx file; an xltx file can be used to store common settings and formatting options for creating multiple spreadsheets.
The xltx file is designed to open with the 2007 version or later of Microsoft Office Excel. Microsoft Excel can be purchased as part of the Microsoft Office Suite or Independently. Older versions if Microsoft Excel are able to open xltx files with Open XML component support.
Xltx files can also be opened with Open Office, a free program for opening all types of spreadsheets and word processor documents. Open Office is completely free and open source. Open Office can be used to open and modify many common types of files including those formats designed by Microsoft to work with Microsoft Office. Open Office is a great free alternative to purchasing Microsoft Office and runs on all major operating systems including Windows, Mac & Linux. Open Office is incredibly user-friendly, easy to install and fully functional; capable of opening xltx files.