LipsyncTool handles lipsync animation in After Effects through smooth interpolation driven by marker-synced keyframe presets. Instead of relying on holds or expressions, it builds the movement from keyframes alone.
The setup centers on a preset layer. You place all your visemes — A, E, O, M, and others — on that preset layer with markers, then apply them to your main art layer instantly. Timeline markers trigger the viseme keyframe sets, and this extends to range markers and multi-frame animations.
Version 1.0, released on June 19, 2025, is the initial release. LipsyncTool runs across a wide span of After Effects versions, from CC 2018 through the 2025 release, and includes CC 2019, 2020, 2021, 2022, 2023 and 2024 in between. A demo video is available for reference.