What is a XLTM file?
A .XLTM file is a Microsoft Excel Macro-Enabled Spreadsheet Template developed by Microsoft. It stores a predefined spreadsheet layout, formatting, and formulas to act as a starting point for new documents. Unlike standard template files, .XLTM files also contain embedded Visual Basic for Applications (VBA) macros. The format uses the Office Open XML standard, which means the file is structurally a .ZIP archive containing text and XML data.
How to open XLTM files?
Usually, you open and edit .XLTM files using Microsoft Excel. Other desktop spreadsheet applications like LibreOffice Calc and Apache OpenOffice can open the spreadsheet data and layout, but they may not execute complex Microsoft VBA macros correctly.
File inspection and conversion
Because .XLTM files contain executable macro code, you should inspect files from unknown sources carefully. viewer.online/xltm analyzes .XLTM files to identify their exact format and creator software, shows which programs can open the file, and usually previews it safely in your browser.
If you need to share the data without macros or convert the template to a standard format, we recommend using convert.guru to convert the .XLTM file to .XLSX, .XLSM, or standard .CSV.
Summary
viewer.online/xltm directly opens and previews .XLTM files in the browser, eliminating the need to install software or troubleshoot compatibility issues.