WATCH THE SYSTEM RUN
UtilitiesSimulations — systems you can poke, prod and replay
From Game of Life to the solar system — interactive simulations you can interfere with, plus new ones described into existence on demand.
Runs locally in your browser. Nothing is uploaded.
Some ideas refuse to be understood from a description — they have to be watched running. The Simulations tool is a shelf of them, from Conway's Game of Life to an orrery of the solar system, each one interactive: change the parameters, disturb the system, replay it, and watch what the rules do with your interference.
The shelf is not fixed. Describe a system you want to see — a population dynamic, an oscillator, a queue, a rumour spreading through a village — and Drazil builds a new simulation from the description. For the curious, that is a machine for asking 'what if' and getting an answer that moves.
It is a study tool disguised as a toy: the intuition you build by disturbing a system is the intuition that later survives equations. Physics, biology, economics, mathematics — the habit of experimenting transfers.
Everything runs locally in the browser: no uploads, no accounts, no install. Free, at whatever velocity your curiosity demands.
What you can do
The parts people actually reach for.
A shelf of systems
Game of Life, the solar system and friends — running and interactive.
Describe new ones
Ask for a simulation of anything; watch it get built.
Interfere freely
Change parameters, disturb the state, replay the results.
Intuition by experiment
The understanding that only comes from watching rules run.
A study companion
The intuition you build here survives the equations later.
Local and free
No upload, no account, no install.
How it works
Three steps, no detours.
Pick a simulation
From the shelf, or describe a system you want to see.
Run and interfere
Watch the rules work; then change things and watch again.
Build your own
Describe a new system and let Drazil construct it for you.
Questions, answered
The ones people ask first.
Which simulations are included?
A growing shelf — Game of Life, the solar system and others — plus new ones built from your descriptions.
Can I request a custom simulation?
Yes — describe the system and Drazil builds it, then you interact with the result.
Does it need the internet?
The included ones are local. Building from a description uses your configured AI provider.
More in Drazil
One workspace, 44 tools — all free, all local.
Runs locally in your browser. Nothing is uploaded. · or browse all 44 tools