What is a MM file?
An .MM file is primarily a Mind Map File used to store visual diagrams of ideas and concepts. These files are typically created by software like FreeMind, Freeplane, XMind, or MindNode. Internally, they often use XML or JSON text formatting to save the nodes, branches, and text content of a diagram.
However, the .MM extension has multiple possible meanings. It is also used as an Objective-C++ Source File in Apple software development, or a NeXtMidas Macro File developed by Technology Management Associates.
How to open MM files?
If your file is a mind map, you can open it natively by installing FreeMind or Freeplane. Mac users can also use MindNode or XMind.
If your file is source code, you can open it with a development environment like Xcode or a simple code editor like Visual Studio Code.
Because an .MM file can contain different types of data, it is best to identify the exact format first. We recommend using viewer.online/mm to identify the actual format of your file before downloading new software.
Inspecting files with viewer.online
viewer.online/mm can analyze .MM files to identify the exact format and creator software. It allows you to safely inspect the file structure, extract readable text, and check whether an online preview is available.
Converting MM files
You might need to share your mind map with people who do not have specific mapping software. We recommend file conversion to sensible target formats on convert.guru. You can easily convert an .MM mind map into standard formats like .PDF, .PNG, or .TXT.
Summary
viewer.online/mm is useful for identifying, inspecting, and understanding .MM files without installing software or dealing with compatibility problems.