Design your system.
Simulate it.
See where it breaks.
Like a flight simulator for system design. Build visually, run real traffic through it, and find the bottlenecks before they find you.
Free, no account needed. Desktop only (for now!).
Add a component. Rewire the flow. See what changes.
Design decisions have consequences. Watch them play out in real time.
Design anything
7 universal blocks that model any domain. Backends, kitchens, hospitals, factories. No infrastructure jargon required.
- ✓Drag, drop, and wire components
- ✓12 behavior modes (queues, retry, circuit breakers...)
- ✓Start from 16 templates or a blank canvas
See it break
Deterministic simulation runs traffic through your design. Watch queues fill, requests drop, and bottlenecks form.
- ✓Animated request flow with live stats
- ✓Scrub the timeline to inspect any moment
- ✓Stress test with traffic spikes and outages
Your AI design partner
Chinilla AI teaches you while you build. It reads your simulation, explains what went wrong, and walks you through the fix. It proposes, you decide.
- ✓Paste code, papers, or specs and get a visual diagram
- ✓AI-generated PRD spec sheets from your design
- ✓Explains the why, not just the what
Export anything. Use it anywhere.
Your designs aren't trapped in a tab. Export a PNG for your GitHub README, an animated GIF that shows your system running, or grab the Python code to keep building outside Chinilla.
Free tier covers the core experience. See what Pro adds →
Practice the systems interviewers actually ask about
Load a real interview problem, run the simulation, and see if your design holds. Each template is fully wired with realistic metrics, behaviors, and costs.
Design it. Simulate it. Understand it.
Free, no account needed.
Try a live simulation"This project was inspired by pottery, the moon, dinosaurs, and DNA-like love."