Discrete Event Simulation, visually

Build queueing system models on a canvas, run them in real time, and read the results from live charts — all in the browser.

How it works

Place generators, queues, and servers on the canvas. Connect them into any topology — tandem queues, parallel servers, multi-stage pipelines.

Set arrival rates, service rates, queue capacities, and wait timeouts. Every parameter can be changed while the simulation is already running.

Watch live charts appear next to each component: queue depths, server state distributions, throughput rates, and end-to-end cycle time histograms.

Runs entirely in the browser. Open the link and start building — no sign-up required for the free tier.

Poisson arrivals and exponential service times give you the classical M/M/c foundation used in telecom, manufacturing, and service system design.

Adjust any parameter mid-run and see the system respond instantly. Explore what-if scenarios without stopping and restarting.

Run the simulation at wall-clock pace or ramp it up to 16× to reach steady state faster. The engine runs in a Web Worker so the UI stays fluid.

The Starter plan is free forever — up to five components, no credit card required.