Chinilla

Chinilla is a system design and simulation app that lets users visually build, test, and analyze how complex systems behave. It is designed for modeling a wide range of domains, including backends, kitchens, hospitals, and factories, using a small set of universal blocks rather than domain-specific infrastructure terms.

The app supports drag-and-drop component wiring, multiple behavior modes such as queues, retries, and circuit breakers, and prebuilt templates for starting from a blank canvas or a structured example. Chinilla runs deterministic simulations that show request flow, queue buildup, dropped requests, bottlenecks, and performance changes over time, helping users understand how design decisions affect outcomes.

Chinilla also includes AI-assisted design support that can interpret a simulation, explain issues, and suggest improvements. Users can paste code, papers, or specifications to generate a visual diagram, create PRD-style spec sheets from a design, and review explanations of system behavior. The app also provides export options such as PNG, SVG, GIF, Python, Mermaid, and shareable live links, making it useful for documentation, presentations, and further development.

The platform also includes learning-focused templates for common system design interview topics such as URL shorteners, chat apps, rate limiters, and CDNs, with step-by-step guidance, stress testing, and progress tracking features. Chinilla is available as a web-based tool focused on visual system modeling, simulation, and analysis.

Website: chinilla.com

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