AI Teaching Whiteboard

Speak a topic.
Watch it draw itself.

Talk through any idea — the AI builds a live whiteboard in sync with your words. Nodes, arrows, code, equations — all drawn as you speak.

Try it free — no sign up See how it works ↓
explainer.app/explain
👤
You
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📱
Your App
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🔐
Auth Server
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🗄️
Resource API
ExplainerOAuth issues a code your app exchanges server-to-server — your password never leaves Google.
Why Explainer

The whiteboard that listens

Built for anyone who teaches, learns, or explains hard ideas for a living.

🎙️

Voice-driven

Talk naturally. No clicking, no dragging. The board builds as you speak — or switch to typing if you prefer.

⚡

Instant diagrams

Nodes appear, arrows connect, packets flow — all in sync with your narration. No post-processing.

🧠

Topic-agnostic AI

OAuth, transformers, TCP/IP, Bitcoin, calculus, cell division — the same engine explains anything.

💻

Code + equations

Explain algorithms line by line with a live code panel, or render LaTeX equations alongside the diagram.

🎬

Present & record mode

Fullscreen dark mode built for screen recording. Step through slides, toggle subtitles — camera-ready.

✏️

Author your lessons

Script a full lesson in JSON, preview it, save it as a chip. AI can draft the whole thing from a topic name.

What can it explain?

Anything with a structure

If it has steps, layers, flows, or relationships — Explainer can draw it.

OAuth 2.0 flow How ChatGPT works TCP/IP stack Bitcoin & blockchain Backpropagation Transformer architecture GPT token generation Database indexes Attention mechanism Kubernetes pods DNS resolution React re-rendering Photosynthesis Dijkstra's algorithm How a CPU works Gradient descent Cell division Supply & demand
How it works

Three seconds to a diagram

No prompt engineering. No config. Just talk.

1

Pick a topic

Choose a built-in lesson chip, or just start talking about any topic you want to explain.

2

The board builds

Nodes appear, arrows connect, key points reveal — all in sync with the AI narration.

3

Present or share

Switch to fullscreen present mode and record your screen. Or send the link to anyone.

Pricing

Start free. Go unlimited.

No credit card to try it. Upgrade when you're ready.

Free
$0 / mo
10 free explanations per day — no sign-up required.
  • 10 turns per day
  • All 7 built-in lessons
  • Voice + type input
  • Present mode
  • Author your own lessons
Try it now →
Coming soon
Pro
$19 / mo
Unlimited explanations, save & share, priority voice.
  • Unlimited turns
  • Save lessons to your library
  • Share lessons via link
  • Priority TTS voice
  • Custom lesson import/export
  • Early access to new features

Get early access

Join the list and be first to know when Pro launches — and get a discount for being early.

FAQ

Questions

What exactly does Explainer do? ▾
You speak or type a topic, and the AI builds a live whiteboard in sync with your words — nodes appear, arrows connect, key points reveal one at a time. Think of it as a 3Blue1Brown-style video, but you drive it in real time.
Do I need to sign up to try it? ▾
No. Click "Try it free" and you get 10 free turns per day, no account needed. Voice input works in Chrome; other browsers use text input.
Can I use it for my own topics — not just the built-in lessons? ▾
Yes. Just start talking about any topic and the AI draws it live. You can also use the Author mode to write a scripted lesson (or have the AI draft one) and save it as your own chip.
Can I record and share my explainer videos? ▾
Yes. Press P or the 🎬 button to enter fullscreen present mode — optimized for screen recording. Step through the explanation slide by slide, toggle subtitles, and record with any screen recorder.
What topics work best? ▾
Anything with structure: protocols, algorithms, architectures, biological processes, economic models, math concepts. If it has steps, layers, or flows — Explainer can draw it. Simple factual Q&A works too but gets more value from the diagram.
When is Pro launching? ▾
Soon. Join the waitlist and we'll email you the moment it's live — with an early-bird discount for waitlist members.