Curvy

Curvy, at motionfun.net, is a free curve editor for After Effects from Motion Fun. You drag a curve to ease the keyframes you have selected. You can also copy an ease from selected keys and apply it to other keys on any layer or property. The page says Curvy scales the speed per property, so the shape holds on Position, Scale or an effect.

Modifier keys change how an ease is applied. Shift applies only the in side, Option applies only the out side, and Cmd applies the ease flipped, with Alt and Ctrl on Windows. You can save favorite curves that stay available in every project, and export them to a file to use on another computer. A built-in library has Linear plus Sine, Quad, Cubic, Quart, Quint, Expo, Circ and Back, each as In, Out and In-Out. The docs also cover typing numbers and CSS curves.

Curvy eases Position, Scale, Rotation, Opacity, effect controls and paths, and skips locked layers and hold keys. After Effects can't push a motion path past its end, so Curvy has a Separate option that splits Position into X and Y and reapplies the curve. The docs note that it holds one curve at a time, so copying several different eases takes the first readable curve.

Curvy is not a separate download. It comes inside Motion Dock, a free After Effects panel from Motion Fun that holds every Motion Fun tool. You download Motion Dock, install its ZXP file with a ZXP installer, restart After Effects, and open it from Window, then Extensions. Curvy works in After Effects 2022 and newer. Davey, the maker, announced it on November 10, 2026.

Pricing: Free, checked November 12, 2026 at https://motionfun.net/tools/curvy. The page says Curvy is free forever, with no trial, no watermark and no locked features. It comes inside Motion Dock, which Motion Fun also lists as free forever. The Motion Dock download asks for no account or email.