XLTX File Extension

Excel Open XML Spreadsheet Template

File Type xltx
Developer Microsoft
Popularity
4.7 (38 votes)
Application Microsoft Excel
Category Data Files, Spreadsheet Files
Format Zip

What is a XLTX file?

Excel Open XML Spreadsheet Template files, recognized by the XLTX extension, fall into the Data Files and Spreadsheet Files categories, amounting to 6309 files.

The Excel Open XML Spreadsheet Template (XLTX) was created by Microsoft, a company that developed file format and produced 242 programs for their use.

XLTX files are supported by Mac OS, Windows and Linux, as well as mobile phones such as Apple iOS, Android and Windows Phone. If you need to open a XLTX file, you can use one of 10 programs, such as Microsoft Excel, OpenOffice Calc and IBM Lotus Symphony.

MIME types

application/vnd.openxmlformats-officedocument.spreadsheetml.template

Windows

Mac OS

How to open a XLTX file?

If you’re having difficulty opening a XLTX file, it is often due to not having the correct software. To solve the problem, choose a compatible program from the list. Then follow the link to the official developer site, download the software, and install it on your device.

The most popular programs for working with XLTX files are Microsoft Excel, OpenOffice Calc and IBM Lotus Symphony. To install the current version of Microsoft Excel, go directly to the official Microsoft website. The universal package for all operating systems is available there.

Following installation, XLTX files should be automatically opened with Microsoft Excel.

Set Microsoft Excel as the default XLTX program

Changing the default program in Windows

Right-click your XLTX file, then navigate to the "Open With" option and click "Choose Another Application" to continue;
In the pop-up window, select the Microsoft Excel application;
Check the "Always use this application" checkbox, and then click "OK" to apply the selected application as the default for opening XLTX files.

Change Default Program on Mac

Right click or Control + left click on the desired XLTX file;
Select "Open in application" and click "Other";
Look at the bottom of the window, where you will see the "Enable" menu. "Recommended Programs" will be selected as the default option;
Within this menu select "All Programs" and navigate to Microsoft Excel. Check the box next to "Always open in app" to make sure it’s the default option.

Convert to and from XLTX

For difficult XLTX files, try converting them to formats like CSV, XLSX, MDB or similar formats to improve usability.

Please note that after converting a XLTX file, some functionality may differ from the original. However, in many cases, it can be converted back to its original format.

Using offline applications such as IBM Lotus Symphony, you can convert XLTX files to various formats without losing data quality.

Convert XLTX to other file formats

Converting Files to XLTX Format

XLSX to XLTX

Solve problems with XLTX files

When issues arise with XLTX files, they can generally be fixed with small software tweaks. Use the troubleshooting tips below to help resolve them.

What are the telltale signs of a corrupt XLTX file?

Corrupted XLTX data files may have one or more of the following symptoms:

Unexpected expansion of the total size of the XLTX file;
Opening or processing the file in Microsoft Excel or other programs causes instability or crashes in the program;
The file shows errors when trying to open it or does not open completely;
While working with the file, error messages appear;
Poor performance when editing a file in Microsoft Excel;

Why does Microsoft Excel crash or shut down frequently?

Microsoft Excel crashes can occur due to outdated software versions. To mitigate this, install the latest updates for Microsoft products.

Restarting your computer will solve many common problems, which is why it’s the first thing you should do before changing any settings related to the software.

Is there any specific software or utility that can help repair a damaged XLTX file?

Open the damaged XLTX file with a recovery program, and then select the "Repair" menu item to start the repair process. Wait for the recovery process to finish, as it will automatically repair damaged data files.

How to edit a XLTX file?

To edit XLTX files, you need to install specialized software that allows you not only to open but also to modify data files. Online XLTX editors usually provide fewer features than software created specifically for Excel Open XML Spreadsheet Template.

List of Top XLTX editors 2026

Taking into account the provided details, we have prepared a list of XLTX editors that match your needs.

XLTX Editor Software	Developer	Platforms	Overall Rating
IBM Lotus Symphony	IBM	Windows	4.7 out of 5 (36 reviews)
Microsoft Excel	Microsoft	Windows, Mac OS, Apple iOS, Android	4.7 out of 5 (37 reviews)
PlanMaker	SoftMaker	Windows	4.4 out of 5 (39 reviews)

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