What is an XLTX File?

How to Open, Edit, & Convert XLTX Files

XLTX Files
XLTX Files.

A file with the XLTX file extension is an Excel Open XML Spreadsheet Template file. This format is used by Microsoft Excel as a template that can be used to build multiple XLSX files that contain the same layouts, formatting, and settings.

The XLTX format was introduced to Excel in Microsoft Office 2007 to replace the older XLT template format (which creates similar XLS files).

Much like MS Office's DOCX and PPTX formats, XLTX incorporates XML and ZIP to reduce the file size.

How To Open an XLTX File

XLTX files are normally only used with Microsoft Excel (see how to create a template file on Microsoft's website). You can open XLTX files in Excel versions older than 2007 if you install the free Microsoft Office Compatibility Pack.

The following free software can open the XLTX format as well, they just can't save the file back to .XLTX (it has to to be saved as something else like XLSX or XLT): OpenOffice Calc, LibreOffice Calc, and SoftMaker FreeOffice PlanMaker.

You can also open the file with a file decompression tool since XLTX files are actually archives. However, it's hardly a useful way to view the file's contents since it doesn't display the document like it would when opened in Excel or the other spreadsheet programs I mentioned. If you do want to go this route, for whatever reason, 7-Zip and PeaZip are two file decompression tools that could be used to open the XLTX file as an archive.

Note: If your file isn't opening with the software I mentioned, double-check that you're reading the file extension correctly. Some file extensions are spelled similarly but have nothing to do with the XLTX format, and therefore the files can't open with the same programs I talk about here. One example is XTL (Vietcong Data) files.

If you find that an application on your PC does try to open the XLTX file but it's the wrong application or if you would rather have another installed program open XLTX files, see my How To Change the Default Program for a Specific File Extension guide for making that change in Windows.

How To Convert an XLTX File

The quickest way to convert an XLTX file to XLSX or XLS is to use one of the XLTX viewers/editors from above, like Microsoft Excel, which supports converting to both formats. The other applications listed above may only support one or the other.

Another easy way to convert an XLTX file is to use FileZigZag. It's an online file converter that can save an XLTX file to XLS, CSV, ODS, OTS, PDF, TXT, and several other formats.

Tip: If you convert the XLTX file to a more popular spreadsheet format like XLSX or CSV, you can then open the file in something other than Microsoft Excel. Some alternative free spreadsheet programs include Kingsoft Spreadsheets, Gnumeric, and Spread32.

More Help With XLTX Files

See Get More Help for information about contacting me on social networks or via email, posting on tech support forums, and more. Let me know what kinds of problems you're having with opening or using the XLTX file and I'll see what I can do to help.