X9M8 QR Generator: A Free QR Code Maker That Builds the Code in Your Browser
X9M8 QR Generator makes QR codes inside the browser, with custom colours, a logo option and PNG or SVG export. Here is what was tested…
apps
Erosion Simulator: Watch Rain Carve a Random Mountain Into River Valleys
A particle hydraulic-erosion simulator: raindrops run downhill over a noise terrain, pick up and drop sediment, and carve drainage networks out of nothing.
Fluid Simulator: Stir the Navier–Stokes Equations in a Browser Tab
A WebGL fluid simulator built on Stam’s Stable Fluids, with dye, vorticity and pressure views, and the 2026 claim that the Navier–Stokes problem is solved.
Reaction–Diffusion Simulator: Turing’s 1952 Equations Running on Your GPU
A WebGL Gray–Scott reaction–diffusion simulator with eight presets, plus Turing’s 1952 paper and where the patterns turn up in living things.
Flocking Simulation: How Three Rules and a Predator Turn 1,200 Dots Into a Murmuration
A browser flocking simulator built on Reynolds’s boids: three rules, a predator, up to 4,000 agents, and why starlings track seven neighbours, not a radius.
Kinetic Shapes: A Physics Sandbox for Bouncing Balls in Spinning Polygons, and the Number That Decides Every Bounce
Kinetic Shapes runs 18 bouncing-ball arenas in the browser. The coefficient of restitution, rotating containers and chaotic billiards, explained with the sandbox.
Hole City: A Browser Game Where You Are the Hole, and the Short History of a Genre Built on Swallowing Things
Hole City is a free two-minute browser game where a growing hole eats a city. How Donut County and Hole.io built the genre, and what…
PDF Workbench: A Free PDF Editor That Runs in Your Browser and Never Uploads Your Files
A free PDF editor that runs entirely in the browser: merge, split, rotate, watermark, sign, fill forms, OCR scans and compress, with no upload and…