A mind map maker that turns brainstorms into walkthroughs

Free
No sign-up
Works offline

Type your ideas, let the branches balance themselves, then press Present and watch the map explain itself.

Open the mind map editor Browse ready-made templates

Present reveals your mind map one step at a time, on its own.

The Solar System — the finished diagram this player draws step by step — This compact player stays quiet while you read. Open the full presentation when you want narration and the complete walkthrough.

Diagramium is a free mind map maker that runs in your browser: you type ideas, and the branches balance themselves around your central topic. Its signature move is Present mode — the map is revealed branch by branch, with optional AI voice narration, so a brainstorm becomes a walkthrough you can replay or record.

There is nothing to install and no sign-up to draw, present, or export a still image. Everything is local-first: your maps stay on your own machine, nothing you draw is uploaded, and after the first load the editor works without a connection. Open the mind map editor and put your topic in the middle — or watch the live example on this page play first.

You type, it arranges

Diagramium lays out mind map branches automatically: add an idea and the whole map rebalances around the central topic. You never stop to drag boxes apart or untangle lines, and that matters most mid-brainstorm — the moment you switch from thinking to tidying, the ideas stop. Type, press on, and the structure takes care of itself.

Automatic does not mean rigid. Every element still responds to drag-and-drop, so you can nudge a branch exactly where you want it, or add a looping animation — a pulse or a glow — to the topic you want eyes on. Hand-drawn themes such as the Doodle pencil sketch or the Sticky-Note workshop look keep a brainstorm feeling like a brainstorm; professional palettes dress the same map for a project review.

The anatomy of a mind map

A mind map has three parts: one central topic, main branches for its major themes, and sub-branches that split each theme into details. Position carries the meaning — anything on a branch belongs to that theme, and depth signals detail. That is the whole notation, which is why mind maps work for study notes, essay plans, and project scoping alike.

Two habits separate a useful map from a hairball. Keep labels short — a branch is a cue, not a sentence — and let one subject own the map. If your ideas cross-link in every direction with labeled relationships, you want a concept map; if order and decisions matter, a flowchart. Both are among the 27 diagram types Diagramium puts in one app. For a fuller method, read our guide on how to create a mind map.

Try it now — free, no sign-up Browse ready-made templates

Press Present and the map does the talking

Present mode turns a finished mind map into a branch-by-branch reveal, with a spotlight following the current topic. Switch on AI voice narration and subtitles with word-by-word highlighting, set background music, and attach a per-step note — a why this matters insight — to any branch. Recording a live take of the show is built into Present mode too, so a planning session becomes an explanation for whoever missed the meeting.

This changes what a mind map is for. A brainstorm stops being a snapshot of ideas and becomes the story of how they fit together — one that replays on demand, in your voice or a narrator's.

From lecture notes to a revision walkthrough

Twenty minutes of typing can turn a lecture's notes into a revision walkthrough you replay before the exam. Put Photosynthesis in the middle. Type three main branches: Light reactions, Calvin cycle, Limiting factors. Under each, add the details from your notes — chlorophyll and ATP under the light reactions; carbon fixation and glucose under the Calvin cycle; light intensity, CO2, and temperature under the factors. The map balances itself the whole time, so what you end with is a clean one-page summary of the topic.

Now press Present. The map rebuilds one branch at a time, spotlight on each topic as it appears — which makes it a self-test: say what comes next before it does. Export the run as an animated GIF (one of the formats a free account adds) and the walkthrough replays anywhere an image can be pasted.

Build a mind map in eight steps

The whole path from an empty editor to something you can share takes eight short steps.

Open the mind map editor in your browser — no sign-up.
Type the central topic: the one subject this map is about.
Add a branch for each major theme, and let the layout rebalance as you go.
Split branches into sub-branches, keeping every label to a keyword or short phrase.
Pick a look — a hand-drawn Doodle sketch for a working session, a classic palette for a formal review.
Press Present to step through the map branch by branch. Add narration and per-step notes if you plan to talk it through, or record a live take as it plays.
Export. PNG and SVG stills are free with no account; a free account adds animated GIF, video, and animated SVG, plus synced favorites and likes in the gallery.
Want a head start? The Explore gallery holds hundreds of ready-made, editable diagrams — and any published diagram can be embedded on your own site as a self-playing iframe.

Frequently asked questions

Is the mind map maker free, and do I need an account?

Diagramium is free and has no paid tier. Drawing, presenting, and exporting PNG or SVG stills need no account at all. Creating a free account adds the animated export formats — GIF, video, and animated SVG — and keeps your favorites and likes in the Explore gallery in sync.

What formats can I export a mind map to?

PNG and SVG stills are available to everyone, with no account. A free account adds three animated formats — GIF, video, and animated SVG — that capture the branch-by-branch reveal. Recording a live take of a presentation is part of Present mode itself and is not tied to an account.

Does the mind map maker work offline, and where is my work stored?

Mind maps are stored locally — in your browser and in the files you download. Diagramium never uploads diagram content, and after the first load the editor runs without a connection, so you can map, present, and export stills anywhere.

Do I have to arrange the branches myself?

No. Branches balance themselves around the central topic as you type, so a growing map stays readable with no manual tidying. Every element still responds to drag-and-drop, so you can fine-tune any position by hand.

Can I present a mind map instead of making slides?

Yes. Present mode reveals a mind map branch by branch, with an optional AI voice reading each step, word-by-word subtitle highlighting, and a spotlight on the current topic. You can attach a per-step note — a "why this matters" insight — to any branch, and record a live take of the show as it plays.

What is the difference between a mind map and a concept map?

A mind map radiates from one central topic and organizes ideas as a hierarchy of branches; a concept map connects many ideas with labeled links that can cross in any direction. Use a mind map when one subject owns the page, and a concept map when the relationships themselves are the point. Diagramium includes an editor for each.

More diagram makers

Open the mind map editor Browse ready-made templates