A studio you can wave at

What it is

It started as a small experiment in drawing with a fingertip and grew into a full studio: five brushes, precise erasing, smart shape cleanup, undo and redo, PNG and video export, and a two-hand mode that makes the camera feel like a magic wand. It works with a mouse, touch or pen too, so anyone can try it.

How it works

The browser reads your camera, MediaPipe finds your hand landmarks on your device, and a small gesture engine decides what your hand is doing: pointing, pinching, an open palm, a fist, or two hands together. Positions are smoothed with a One Euro filter so lines stay steady, and gestures use hysteresis so they don't flicker. Everything is drawn on a canvas you can export.

Nothing is uploaded. Read the privacy page for the details.

Built with

MediaPipe Hand Landmarker

On-device hand tracking: 21 landmarks per hand, up to two hands

React 19 + TanStack Start

App shell, routing and server rendering

Canvas 2D

Layered rendering with a cached bitmap for finished strokes

Tailwind CSS 4

Styling and the dark studio theme

Vitest

Tests for gestures, smoothing, shape snapping, conjure shapes and undo history

Open source

The code is public. Browse it, file an issue, or suggest a new gesture.