Build, visualize, and test your system architecture with an intuitive drag-and-drop interface. Collaborate in real-time, connect to APIs, and iterate fast.
Your architecture diagrams and API configurations stay on your device. No accounts, no cloud storage, no tracking.
All your diagrams are stored in your browser's local storage. Export to JSON anytime to back up or share.
Zero analytics, no cookies, no fingerprinting. We don't know who you are or what you build.
API configurations for testing flows are stored locally and requests are made directly from your browser.
A complete toolkit for designing, testing, and iterating on your system architecture.
Intuitive interface with 25+ pre-built components for servers, databases, queues, and more.
Work together with your team. See cursors, share rooms, and build architecture diagrams in real-time.
Test your architecture by running data through the flow. See how components interact in real-time.
Connect nodes to real APIs. Make GET/POST requests and pass data between nodes using expressions.
Two AI modes: Create architectures from descriptions or analyze existing diagrams for insights.
Ask AI to explain your architecture, find bottlenecks, suggest improvements, or perform security reviews.
Use {{$input}} expressions to pass data between nodes. Transform, filter, and route data dynamically.
Export your diagrams as PNG, SVG, or JSON. Import previously saved architectures to continue working.
All data stays in your browser. No accounts, no tracking. Collaboration is peer-to-peer via Liveblocks.
Design and test your architecture in four simple steps.
Choose from servers, databases, APIs, queues, and more. Arrange them on the canvas and connect with arrows.
Create a room and share the link. Team members can join and edit together with live cursors.
Enable API integration on any node. Set endpoints, headers, and use expressions like {{$input}}.
Add dummy data and run the simulation. Watch data flow through your architecture in real-time.