.XLT File Extension
Microsoft Excel Spreadsheet Template (Legacy)
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What is an XLT file?
An XLT file is a template created by Microsoft Excel, a spreadsheet application included in the Microsoft Office suite. It contains default formatting and data for a spreadsheet and is used to create new .XLS files. XLT files are saved in the Excel Binary File Format, which was Excel's primary file format until the Office Open XML format (.XLTX) replaced it in Excel 2007.
Microsoft Excel includes a number of pre-created XLT files that allow you to quickly create common documents, such as budget planners, calendars, and invoices, from predefined templates. You can also create custom templates from your own spreadsheets, allowing you to quickly create similar spreadsheets in the future.
Excel is the most widely-used spreadsheet application in the world. It comes with every edition of the Microsoft Office suite and is used in home, academic, and business environments.
NOTE: Although XLTX files replaced XLT files, Excel 2007 and later versions still support XLT files.
How to open an XLT file
You can open XLT files in Microsoft Excel (Windows, Mac, iOS, Android). To do so, select File → Open from the program's menu bar. After you do, you can either edit the template the XLT file contains, or you can use the XLT file to create a new spreadsheet.