This article explains what a DOCM file is and how to open or convert a DOCM file.

A file with the DOCM file extension is a Microsoft Word document that contains macros.

These files were introduced in Office 2007 and are similar to DOCX files, except that they can also store formatted text, images, shapes, charts, and more. The difference is that they can run macros to automate tasks in Word.

This format uses XML and ZIP to compress data into a smaller size, similar to other Microsoft XML formats such as DOCX and XLSX.