GP Shaper is an add-on that converts single Grease Pencil strokes into precise geometric shapes directly in Draw mode. By hovering over a freehand stroke and pressing a shortcut, the tool can instantly transform it into an ellipse, circle, arc, rectangle, square, polyline, or straight line.

The tool features a pie menu for quick shape selection and includes built-in angle snapping in 15-degree increments. Users can easily equalize proportions, such as turning a rectangle into a perfect square or an ellipse into a circle, by double-tapping the conversion shortcut. After conversion, shapes can be adjusted in the Redo panel, and a dedicated popover menu in the viewport provides access to auto-detect settings and keymap customization.