Is mysimulator.uk really free?

Yes, entirely. Every simulation, article and tutorial is free to use, with no account, paywall or usage limit. The whole project is funded as a personal, ad-light passion project rather than a commercial product.

Do I need to install anything?

No. Every simulation is plain HTML, CSS and JavaScript that runs directly in your browser tab using WebGL or Canvas 2D. There is no build step, no app to download and no plugin to enable.

Can I use these simulations in my classroom?

Yes. All content is licensed CC BY 4.0, which explicitly allows classroom and LMS use — link directly to a simulation or embed it in an iframe. See the Teacher's Guide for curriculum-aligned starting points.

How accurate are the simulations?

Each simulation implements a real numerical method — Runge-Kutta integrators, Smoothed Particle Hydrodynamics, Barnes-Hut trees, finite-difference solvers and so on — rather than a scripted animation. Many link to an in-depth article explaining the mathematics and citing sources.

Who builds mysimulator.uk?

A small team of developers and science writers, using AI-assisted drafting with human review for accuracy — see the Team page for the editorial and fact-checking process.

Can I reuse or modify the content?

Yes — everything is released under CC BY 4.0. You may copy, adapt and redistribute simulations, articles and images for any purpose, including commercially, as long as you credit mysimulator.uk.

About | mysimulator.uk

About

Science You Can Touch

mysimulator.uk is a free library of 1,000+ interactive simulations of physics, space, biology and mathematics — running entirely in your browser. No install, no account, no cost.

🆓

Free Forever

All simulations and learning materials are open forever. No subscriptions or hidden terms.

🔓

Open Source

Study the implementations — from GLSL shaders to SPH and N-Body algorithms, right in your browser.

⚡

Zero Install

Pure HTML + CSS + JS without build tools or a server. Open a page — the simulation runs instantly.

⊞ Browse Categories ✉️ Contact

Textbooks describe motion. We let you cause it.

Most physics and maths content on the web is either a static diagram or a locked-down paywalled course. mysimulator.uk takes a different approach: every concept — from Smoothed Particle Hydrodynamics to the Lorenz attractor to CRISPR gene editing — gets a live, adjustable model you can nudge, break and rebuild. Drag a slider and watch a chaotic pendulum diverge from an identical twin in real time; that's a more durable lesson than any paragraph of prose.

The project started as a handful of Three.js experiments and grew into a library spanning physics, space, biology, chemistry, mathematics, computer science and the social sciences. Every simulation implements a genuine numerical method rather than a scripted animation — Runge-Kutta integrators, Barnes-Hut trees, finite-difference solvers, spring-mass systems — so what you see on screen is the same mathematics researchers actually use.

Three.js · WebGL Canvas 2D GLSL Shaders No build step

How it works

No build tools. No server. No lock-in.

Every page is self-contained HTML, CSS and JavaScript — the same files your browser downloads are the same files we edit.

🧮

Real numerical methods

Velocity Verlet, RK4, Leapfrog, Smoothed Particle Hydrodynamics, Barnes-Hut octrees — the same algorithms used in research and industry code, just running at interactive speed in your tab.

🖌️

WebGL & Canvas 2D

Heavier scenes use Three.js and hand-written GLSL shaders for GPU-accelerated particles and fluids; lighter ones use plain Canvas 2D — whichever renders best at 60 FPS.

🌍

Three languages, one codebase

English, Ukrainian and Polish mirrors share the same simulation engine — only the surrounding text and UI strings change, so every translation stays scientifically identical.

Explore further

More ways into the library

💼

Science You Can Touch

Free Forever

Open Source

Zero Install

Textbooks describe motion. We let you cause it.

No build tools. No server. No lock-in.

Real numerical methods

WebGL & Canvas 2D

Three languages, one codebase

More ways into the library

By Profession

For Kids & Teens

Deep-dive Articles

Frequently asked questions

What did you find?