System Design Diagram Tool
Describe a system — "video streaming like YouTube" — and get an architecture diagram with clients, services, databases, caches and queues grouped into zones. Then see how it holds up as traffic grows.
- Services with icons, grouped into zones
- Sync and async connections
- Scale simulator: where it breaks at 10K → 10M users
- Animated posters and narrated explainer videos
- GitHub repo to architecture diagram
How it works
- Describe the system
- The AI designs the architecture
- Edit services and connections
- Simulate scale, export or present
Try it with
- URL shortener on AWS
- Video streaming like YouTube
- Real-time chat with WebSockets
- Food delivery like Swiggy
Frequently asked questions
Is it free?
Yes. Drawing by hand is always free and every account includes free AI credits. AI Flowchart Pro adds unlimited AI generation and every diagram type.
Can I practise system design interviews?
Yes. Interview Prep has classic questions like Design WhatsApp and Uber with reference architectures and an AI interviewer that scores your design.
Can I export it?
Yes — PNG, SVG, PDF, PowerPoint with an editable slide, Mermaid code and draw.io. You can also share a live link or present it full screen.