About KeyFast

KeyFast, developed by Breton Brander, is a script for After Effects that streamlines repetitive keyframe work. It offers one‑click animations for trim paths, slide, scale, rotate and fade, automatically applying easing. Users can select multiple layers and apply keyframes simultaneously, stagger or align keyframes, copy and paste across layers, and add overshoot or reverse timing. The panel is customizable, with quick popup controls for ease, overshoot and slide values, hotkey modifiers, and switchable horizontal or vertical button layouts. A compact interface fits tight workspaces, and hover tooltips plus a quick‑start guide aid new users. Compatible with After Effects CC 2017 through 2026, the current version is 1.2 (2022‑10‑28).

Features

• One-click animations for trim paths, slide, scale, rotate and fade, with easing applied by default
• Apply animations across many selected layers at once, placing keyframes and easing together
• Stagger layers or keyframes up or down, and align keyframes across multiple layers to the playhead
• Overshoot for rotation, position and scale, plus time-reverse keyframes and trim path direction changes
• Copy and paste keyframes across multiple layers, and center anchor points before rotating or scaling
• Customizable ease, overshoot and sliding values via quick popup panels, with command and shift hotkeys
• Adjustable horizontal or vertical button layout in a compact panel, with hover tooltips and a quick start guide

Best for

After Effects animators who need to speed up repetitive keyframe creation, easing adjustments, and batch layer animation.