BlockCode
Free for schools & students

Snap. Code.
Make it Blink! ✨

Build real Arduino & ESP32 projects right in your browser — no downloads, no fuss.

Start Coding Now See how it works
🖥️ 5+ Boards supported
📦 0 Things to install
🌐 100% In the browser
🎓 K-12 All ages welcome
How it works

Zero to blinking in 4 steps

Seriously, it's that easy.

Snap your blocks

Drag & drop colourful blocks. Code genrates itself.

Plug in your board

Connect over USB.

Hit Upload

Compiles in the cloud. Flashes in seconds.

Watch it work!

See it light up, move, or make noise. Real hardware!

Features

Everything a young maker needs

Built for classrooms. Loved by kids.

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Visual Block Coding

No syntax errors. Just drag, snap, and go.

⬆️

One-click Upload

Compile & flash firmware from your browser tab.

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AI Mentor

A coach that guides — never just gives answers.

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Serial Monitor

Watch live sensor data right inside the IDE.

🖥️

6 Boards

ESP32, ESP32 mini, Node MCU, Arduino Uno, Nano & Mega.

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No Install Ever

Open a browser. Start building. That's it.

Hardware

Works with boards you already have

Plug in. Connect. Go.

ESP32 ESP32-C3 Pro Mini Node MCU Arduino Uno Arduino Nano Arduino Mega
AI Mentor

Your personal robot teacher 🤖

Built right into the IDE. It knows what you're building and helps you think — not just copy.

  • 💡 Explains any block in simple words
  • 🐛 Helps find bugs without spoiling the fun
  • 🗺️ Suggests what to build next
  • 🏫 Teaches — doesn't just give answers
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AI Mentor
Always ready
My LED isn't blinking
Let's fix it!
1. Check your pin number — ESP32 built-in LED is pin 2
2. Add a delay block after HIGH and LOW so the blink is visible!
It works now! What do I build next?
Great job! Next challenge: make the LED blink only when you press a button. Want me to show you the blocks?
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Ready to build something amazing?

No account needed. No installation. Just open your browser.

Start Building Now