Software & Apps File Types 28 28 people found this article helpful What Is a DOCM File? How to open, edit, and convert DOCM files by Tim Fisher General Manager, VP, Lifewire.com Tim Fisher has 30+ years' professional technology support experience. He writes troubleshooting content and is the General Manager of Lifewire. our editorial process Facebook Twitter LinkedIn Tim Fisher Updated on February 18, 2020 File Types Design Cryptocurrency MS Office Windows Linux Google Drive Apps File Types Backup & Utilities View More Tweet Share Email A file with the DOCM file extension is a Word Open XML Macro-Enabled Document file used in Microsoft Word. It was introduced in Microsoft Office 2007. DOCM files are just like DOCX files except that they can execute macros, which lets you automate repetitive tasks in Word. This means that just like DOCX files, DOCM files can store formatted text, images, shapes, charts, and more. DOCM files use the XML and ZIP formats to compress the data down to a smaller size, similar to Microsoft's other XML formats like DOCX and XLSX. How to Open a DOCM File Macros embedded in DOCM files have the potential to store malicious code. Take great care when opening executable file formats received via email or downloaded from websites you're not familiar with. See our list of executable file extensions for a full list of these types of file extensions. Microsoft Word (version 2007 and above) is the primary software program used to open DOCM files, as well as edit them. If you have an earlier version of Microsoft Word, you can download the free Microsoft Office Compatibility Pack to open, edit, and save DOCM files in your older version of MS Word. You can open a DOCM file without Microsoft Word using Microsoft's free Word Viewer, but it just lets you view and print the file, not make any changes. The free WPS Office Writer, OpenOffice Writer, LibreOffice Writer, and other free word processors, will also open and edit DOCM files. If you find that an application on your computer tries to open the DOCM file but it's the wrong application or you'd rather have another installed program open DOCM files, learn how to change the default program for a specific file extension in Windows. How to Convert a DOCM File The best way to convert a DOCM file is to open it in one of the DOCM editors from above and then save the open file to another format like DOCX, DOC, or DOTM. You can also use a dedicated free file converter like FileZigZag to convert the DOCM file online or with a desktop program. FileZigZag is a website, so you have to upload the DOCM file before you can convert it. It lets you convert the DOCM to PDF, HTML, OTT, ODT, RTF, and other similar file formats. Still Can't Open the File? If none of the programs mentioned above are letting you open the DOCM file, the most likely reason is because you're misreading the file extension. It's common for file formats to use file extensions that resemble the ones used for other, unrelated formats. For example, DOCM looks a lot like DCO and DMO, two other file extensions. However, those extensions belong to formats that aren't related to MS Word at all. Safetica Free Encrypted Virtual Disk Archive (DCO) and Cube 2: Sauerbraten Demo (DMO) files require completely different programs to be installed before you can use them. DCO and DMO are just two examples. Take a second look at the file extension at the end of your file, and then do some research online or here on Lifewire to see if you can dig up the program that's capable of opening, editing, or converting it.