by mamoworld tools·Workflow
Images © mamoworld tools. Used for product review; image policy.
KeyTweak earns its place in the aescripts library as a narrow utility: instead of touching every keyframe on a dense mask, you edit one or two and let the rest follow. Its broad version support, spanning CS3 to After Effects 2026, means it fits both current and legacy projects.
KeyTweak is a plugin from mamoworld tools that speeds up editing animations built from many keyframes in After Effects. When a mask carries a hundred keyframes, correcting mistakes normally means adjusting each one by hand. With KeyTweak, you modify one or two keyframes and the rest update automatically.
The plugin runs across a wide range of After Effects versions, from the current 2026 release back through the CC line and older builds down to CS3. It offers a local mode that works on 2d properties such as corner pin points, and a mode setting that is saved in the After Effects preferences and restored the next time KeyTweak launches. If you apply it to a mask whose vertex count changes, it returns a clear error message.
The current version is 2.5.002, released in February 2021, which fixed issues with using local mode on 2d properties. A demo video is available. KeyTweak stands out in the aescripts library as a focused utility for keeping keyframe-heavy animations editable without reworking every point.
KeyTweak is best for after Effects artists correcting mask animations that contain many keyframes without editing each one by hand.
KeyTweak is completely free to download and use.
KeyTweak lists compatibility across a wide range of After Effects releases, from the current 2026 version back through 2025, 2024, 2023, 2022, 2021, and 2020, along with the CC line including CC 2019, 2018, 2017, and the 2015 builds, plus older versions down to CS6, CS5.5, CS5, CS4, and CS3. Whether you're on a recent release or maintaining an older project, the supported list covers both ends. For the definitive requirements tied to your exact build, check the developer's page.
KeyTweak is listed as free in this catalog. Pricing and licensing can change over time, so for the current terms, the download link, and any licensing details tied to your use, refer to the developer's page on aescripts. The plugin comes from mamoworld tools and runs in After Effects across a broad version range, and its most recent release is version 2.5.002 from February 2021. Because terms can change, the developer's page is the reliable source for what applies to your setup today.
KeyTweak includes a local mode that works on 2d properties such as corner pin points, and version 2.5.002 fixed issues with using local mode on those properties. Its core workflow applies to animations built from many keyframes: rather than adjusting each keyframe individually, you edit one or two and the rest update automatically. So while masks are the headline case, the local mode extends the same approach to corner pin points and similar 2d properties inside After Effects.
KeyTweak returns a meaningful error message when you try to apply it to a mask with a changing vertex count, a safeguard added in version 2.4. The plugin is built for masks and properties where you adjust one or two keyframes and let the rest update automatically, so a mask whose vertex count shifts between keyframes falls outside that workflow. If you see this message, check that the mask keeps a consistent number of vertices across the keyframes you're editing.
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