Open source & Browser-native

The free Simulink alternative
for the modern web

Build, simulate, and analyze block diagram systems without installing a single byte. WASM-powered, AI-integrated, and zero-cost forever.

Start Simulating Free Agent API Docs

Why engineers choose BlockWerk

Simulink is powerful — but friction-heavy. BlockWerk brings the same modelling paradigm to your browser, augmented by modern AI.

⚡

Zero Setup

Open blockwerk.tech and start building. No installation, no account required, no license keys to manage.

🧠

AI-Assisted Design

Describe your system in plain language. The built-in AI assistant builds the diagram and tunes parameters for you.

⛲

High Performance

A native Rust simulation engine compiled to WebAssembly. Near-native speed with precise numerical solvers.

📡

Live Sensor Input

Connect your smartphone's IMU or custom WebSocket data directly into your running simulation for HIL testing.

🤖

Agent API

Programmatically build and inspect diagrams via JavaScript. Designed for LLM-driven autonomous engineering workflows.

💰

Truly Free

The core simulator is free for everyone. No student limits, no watermarks, no hidden subscription costs.

BlockWerk vs Simulink

A practical comparison for engineers evaluating simulation tools for control systems, robotics, and signal processing.

Feature	BlockWerk	Simulink	Xcos (Scilab)
Cost	✓ Free Forever	✕ $$$$ / year	✓ Free
Installation	✓ None (In-Browser)	✕ Heavy Install (6GB+)	✕ Desktop App
AI Copilot	✓ Built-in (GPT-4/Claude)	✕ None	✕ None
Live Telemetry	✓ Mobile Sensors / WebSocket	△ Toolbox (Paid)	✕ No
Programmatic API	✓ Agent API (JS)	✓ MATLAB Scripting	△ Limited Scilab
Offline Mode	✓ Yes (PWA)	✓ Yes	✓ Yes
Precision Solvers	△ Heun / RK4 (Fixed)	✓ Variable-Step / Stiff	△ Limited
Code Generation	△ Roadmap	✓ Embedded Coder	△ Partial C
Collaboration	✓ Instant URL Sharing	✕ Offline Files	✕ Offline Files

Who is it for?

From hardware startups to signal processing students.

🎓 Education

Modern controls courses don't need a lab full of MATLAB licenses. Students can run complex sims on any device, anywhere.

🚧 Rapid Prototyping

Sketch a control loop in 60 seconds. The AI turns your verbal description into a working mathematical model instantly.

🤖 AI Agents

Give your LLM a "sandbox" to test ideas. Use the Agent API to programmatically build, run, and optimize system designs.

Frequently Asked Questions

Do I need MATLAB to use BlockWerk?

Absolutely not. BlockWerk is a completely independent ecosystem. The simulation engine and UI run natively in the browser using Rust/WASM.

Is my data secure?

Simulation data and diagrams are processed locally on your machine. We don't store your proprietary designs unless you explicitly use our secure cloud backup features.

Can I import existing Simulink files?

Native .slx import is currently in experimental development. For now, we recommend recreating diagrams using our AI assistant, which can "read" screenshots of diagrams.

How do I use the Agent API?

The API is globally available via window.blockwerk.agent. You can find full technical documentation here.

The free Simulink alternativefor the modern web