Pick a tool (line / rectangle / circle / text), choose color and line width, then click-drag on the canvas. Wheel zooms, middle-drag or Space+drag pans, Fit resets the view. Snap / Osnap toggle grid & object snapping. Import DXF preserves layer colors and supports LINE / CIRCLE / ARC / ELLIPSE / SPLINE / LWPOLYLINE / TEXT / POINT. Export DXF / SVG / PNG / JSON. All in your browser.