About MerMindMap

A friendly mind-map editor that speaks Mermaid.

MerMindMap is a visual mind-map editor that runs in your web browser. You can sketch ideas quickly with the keyboard or the mouse. Each map is saved in plain-text Mermaid mindmap format, so your work is never locked away. You can open it in any text editor, paste it into documentation, or render it with other Mermaid tools.

What you can do

Build maps fast: press Tab for a child topic and Enter for a sibling, just like desktop mind-mapping tools.
Arrange freely: drag branches around, re-parent topics by dropping them on another topic, and draw dotted connectors between ideas.
See the code: the Code pane shows the Mermaid text, and edits there update the map instantly (and vice versa).
Keep everything in one place: your maps are saved to your account automatically and are ready whenever you sign in.
Bring your own files: import and export .mmd files, or save to and open from your Google Drive.
Light or dark: switch themes to suit your eyes.

Why Mermaid?

Mermaid is a popular open text format for diagrams, supported by GitHub, GitLab, Notion, Obsidian and many other tools. Because MerMindMap uses it as its native file format, a map you make here can live alongside your notes and code. Positions and connectors you add by hand are kept as Mermaid comments, so the file still works everywhere else.

Your data

Your maps belong to you and only you can see them. Google Drive access is optional and limited to files you create or choose. See the Privacy Policy for details.

Get started

New here? Read the directions for a quick tour, or create a free account. Questions or feedback are always welcome at [email protected].