Mind Map Builder

What this tool does

The Mind Map Builder is a canvas where you turn a single idea into an organised, branching diagram. It opens with a small starter map — a central node and three branches — so you can see how it works straight away. From there you build outward: each node is a rounded, coloured box holding editable text, and connecting curves show how every branch grows from its parent. The whole map lives in your browser, with full undo and redo, and exports as a PNG image or as a JSON project file you can reload later.

Mind mapping suits the way people actually think. Instead of forcing ideas into a top-to-bottom list, it lets you place a topic in the middle and let related thoughts radiate out. That spatial layout makes connections, themes and missing pieces far easier to see.

When you would use it

Students use mind maps to revise: one node per topic, child nodes for the key facts, and the whole subject visible on a single screen before an exam. Writers use them to plan — a central thesis with branches for each argument keeps an essay or article structured before the first sentence is written.

Educators build them as classroom handouts or live on a projector, growing a diagram with a class as a discussion unfolds. Project planners sketch the shape of a piece of work: a central goal, branches for each workstream, and leaf nodes for individual tasks. Teams running a quick brainstorm can capture every suggestion as a node and reorganise later. Anyone weighing a decision can map the options and their pros and cons side by side.

How to use it

1. The starter map loads automatically. Click any node once to select it — a selected node shows a darker outline.
2. To add a branch, click the small + handle at a node’s bottom-right corner, or select a node and press Add child. A new connected node appears nearby.
3. Double-click a node to edit its text directly, or use the text field in the selected-node panel. Press Enter to confirm.
4. Drag any node to move it. Its connecting curve follows automatically, so you can spread the map out for clarity.
5. Pick a branch colour from the preset swatches to group related ideas by colour.
6. To delete a node, select it and press Delete node (or the Delete key). If it has children you will be asked to confirm, since the branch is removed with it.
7. Use Undo and Redo freely — every change is tracked.
8. Export with Download PNG for a shareable picture, or Save JSON to keep an editable copy. Load JSON brings a saved map back.

Tips for great results

Keep node text short — a few words, not a sentence. Mind maps work because they are scannable, and long labels wrap to two lines and lose that punch. Use colour deliberately: give each major branch its own colour so the eye can trace a theme instantly. Spread nodes out before exporting a PNG so curves do not overlap; the canvas is generous, so use the space. Build breadth before depth — capture all the top-level branches first, then go back and add detail, which stops you disappearing down one branch too early. When a map gets large, save the JSON as a checkpoint so you can experiment without fear.

For other visual planning, the Flowchart Maker turns a process into connected shapes, and if you need a layout grid for arranging exported diagrams on a page, the grid generator can help.

Privacy

Everything in the Mind Map Builder happens on your own device. The tool is client-side JavaScript: your nodes, their text and any JSON file you load stay inside the browser tab and are never uploaded, stored on a server or logged. Close the tab and unexported work is discarded. You can map sensitive plans, private study notes or early-stage ideas here knowing none of it leaves your computer.