What Is Grant Kot's Website (grantkot.com)?

Updated

grantkot.com is Grant Kot's personal showcase of interactive browser demos, mostly real-time physics and simulation experiments you can open and play directly in a web browser. It is a portfolio-style site rather than a product or service: there is no account system described, and the page does not state pricing or login requirements. Many demos are explicitly described as mobile-friendly, so a phone or tablet is enough to try several of them.

Main demos on the site

The homepage presents five featured demos, each with a short description and a "Play" link:

Demo What it is Notes from the site
Liquid Layers Real-time interactive liquid simulator Mobile-friendly; try on a phone or tablet and enable the accelerometer
Tutti Space Program Space simulator Built to push WebAssembly (multithreading & SIMD) and WebGL
Pencil Physics Draw and simulate any shape Mobile-friendly with full multi-touch and pen input support
VoxelMash Multiplayer voxel sandbox The voxel world is synchronized with all visitors; a new version is in development
Synthesizer Web Audio synthesizer Multi-layered with highly customizable sounds; mobile-friendly

A "Classic TLDraw" link also appears alongside Liquid Layers.

Other experiments linked from the page

Below the featured demos, the site groups additional experiments by category:

  • 2D physics experiments — bouncing blobs with soft-body physics, polygon interactions, and sine wave patterns (Poly!, Blobs, Sine).
  • Tokyo 3D — a 3D point cloud viewer of Tokyo, available as Points or Points + Mesh. The site warns that memory requirements are high, especially for Points + Mesh.
  • Liquid 3D — early-stage 3D fluid simulation tests (MPM, SPH). The author notes performance is not the best yet.
  • Million Checkboxes — a multiplayer checkbox demo, described as a remake of One Million Checkboxes originally created by Nolen Royalty (@itseieio).

What to expect when you visit

  • Runs in the browser. The demos are web-based; the space simulator specifically leans on WebAssembly and WebGL.
  • Mobile support varies by demo. Liquid Layers, Pencil Physics, and the Synthesizer are called out as mobile-friendly; Liquid Layers and Pencil Physics benefit from device motion or touch/pen input.
  • Some demos are works in progress. VoxelMash has a new version in development, Liquid 3D is described as very early stage, and a "Liquid Layers Maker" is listed as coming soon — a combined 2D sandbox with line physics, blobs, and smoke, plus a site for sharing creations.
  • Heavier demos need a capable machine. The Tokyo 3D point cloud, particularly Points + Mesh, is the clearest example of a memory-intensive demo.

Background from the author

The page includes a short note on the project's direction: Grant Kot originally worked on a 3D voxel game (Liquid Crystal) aimed at pushing CPU and GPU limits, but found that focusing on large simulations came at the cost of interaction and UI. He is now concentrating on the web and his most compatible simulations to build an audience, citing faster iteration with a web-based tech stack and the growing power of WebAssembly and WebGPU. Demos for Liquid Crystal are available for download on his itch.io page (kotsoft.itch.io) for those with a powerful computer.

To follow updates, the site points to @kotsoft and @GrantKot.