Convert XLM to XLSM

The XLM file extension stands for "Excel Macro", a format used in early versions of Microsoft Excel to store macro instructions. Introduced with Excel 4.0 in the early 1990s, XLM files enabled automation of repetitive tasks by recording sequences of actions performed within the spreadsheet. They were pivotal in the evolution of Excel's macro capabilities, which later transitioned to VBA (Visual Basic for Applications). While XLM is largely obsolete now, understanding its role is crucial for grasping the history of Excel's automation features.

The XLSM file extension stands for Microsoft Excel Macro-Enabled Spreadsheet. It allows users to automate tasks via macros, enhancing productivity in complex data manipulation and repetitive operations. Introduced with Excel 2007 as part of the Office Open XML format, XLSM files support the embedding of VBA (Visual Basic for Applications) macros within spreadsheets. This format offers advanced functionalities for financial analysis, data modeling, and automation within the Microsoft Excel environment, optimizing efficiency for professional use.