Mini-Paint-Oh

Mini Paint Oh is a free, browser-based 3D miniature painting simulator. Load your own models and paint them right in the browser — no installs, no accounts, no server required.

Paint

• Brush, Flood Fill, and Eyedropper tools with adjustable size, opacity, and hardness
• Drybrush mode highlights raised edges, Wash settles color into recesses
• Triad mode applies shadow, midtone, and highlight in a single stroke
• Mask areas to protect finished work while you paint freely
• Full undo/redo history

Kitbash

• Load multiple models (STL, OBJ, 3MF, FBX) and combine them into custom creations
• Delete faces, fill holes, and bridge parts together
• Sticky Mode lets you snap parts together magnetically — move an arm near a torso and watch it lock into place
• Merge everything into a single exportable model

Bake & Export

• Bake painted vertex colors from a high-poly model onto a low-poly version
• Texture bake generates a UV-mapped low-poly with a PNG texture map
• Export as OBJ + MTL for use in games, 3D printing prep, or other tools
• Save/load projects as JSON to pick up where you left off
• 3-up screenshot mode for showing off your work

How to use Drop any STL, OBJ, 3MF, or FBX file onto the canvas, or use the Load buttons. Left-click to paint, right-click to orbit, scroll to zoom. Everything runs locally in your browser — your files never leave your machine.

Built with Three.js. Works on any modern browser. Hot Ducks Welcome.