What Is an XLM File?

A file with the XLMfile extensionis an Excel 4.0 macro file.

This macro format was first added to Excel in v4.0, released in 1992.

XLM files in Windows 10

An XLM file is an outdated format that is, in and of itself, a macro file.

Microsoft’s freeExcel Viewershould work, too, plus the freeLibreOffice Calc.

Go toFile>Options, chooseTrust Centerfrom the left, and then selectTrust Center Settingsfrom the right.

Excel Options Trust Center settings

At the bottom, snag the box next toOpen selected file types in Protected View and allow editing.

SelectOKon the open windows to save, and then have a go at kick off the XLM file again.

Still Can’t launch the File?

Excel Trust Center macro settings

Some files use an extension that closely resembles XLM, even if the formats aren’t related.

XMI is one example.

A similar file extension is LMX.

Excel Trust Center file block settings