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AEAfter Effects

Elastic Comp Changer

by Mathieu Glatigny·Workflow

Images © Mathieu Glatigny. Used for product review; image policy.

Why we like it

Earns its place in the aescripts library as a focused tool for retiming compositions, offering granular control over which keyframes, markers, layers and points shift when the duration changes.

What is Elastic Comp Changer?

Elastic Comp Changer is a script for After Effects that changes the duration of a composition, along with its layers and its nested pre-comps. Adding or removing frames is handled through dedicated + and - buttons, and an Options window gives access to the finer settings.

Beyond the composition length itself, the script can offset all keyframes placed after the playhead and move layer markers and comp markers that sit after it. It can apply changes to both unlocked and locked layers, and offset keyframes in inactive layers when the keyframe offset option is active. Layer start times can be modified after the playhead, and In/Out points can be moved while start times are preserved.

The current release, version 2.0.2 from October 2025, refines how nested locked pre-compositions are treated when the Locked Layers option is off. It is compatible with After Effects 2026, 2025, 2024, 2023 and 2022, and a demo video is available.

Who is Elastic Comp Changer best for?

Elastic Comp Changer is best for after Effects users retiming compositions who want to change duration while keeping keyframes, markers, layers and nested pre-comps in sync.

How much does Elastic Comp Changer cost?

Elastic Comp Changer is completely free to download and use.

Key features

  • Add or remove frames from the composition's current duration using dedicated + and - buttons
  • Offset all keyframes placed after the playhead
  • Offset layer markers and comp markers positioned after the playhead
  • Apply changes to both unlocked and locked layers, and offset keyframes in inactive layers when the keyframe offset option is enabled
  • Modify layer start times after the playhead
  • Move In/Out points while preserving layer start times
  • Options window for adjusting the settings

Tags

#After Effects#composition#duration#keyframes#markers#pre-comps#timing#script

Frequently asked questions

Does Elastic Comp Changer work with After Effects 2026?

Elastic Comp Changer supports After Effects 2026, 2025, 2024, 2023 and 2022, so it runs across recent releases of the application. The current version is 2.0.2, released on October 27, 2025. If you work on multiple machines with different After Effects versions in that range, the script is built to function on each of them. For any version outside this list, check the developer's page to confirm support before installing.

Is Elastic Comp Changer free to use?

Elastic Comp Changer is listed as free in this catalog, so you can add it to your toolkit without a purchase. Licensing terms can change over time, so for the current details and any conditions attached to distribution, refer to the developer's page. That page is also the best place to find download links, documentation and the latest version information whenever you need it.

What changed in Elastic Comp Changer 2.0.2?

Elastic Comp Changer 2.0.2, released on October 27, 2025, changed how nested locked pre-compositions are handled: they are no longer processed when the Locked Layers checkbox is off. Earlier releases in the 2.x line introduced a new UI, independent movement of keyframes and markers, the ability to offset comp markers, and support for key labels. For the full history, the developer's page lists the complete changelog.

How does Elastic Comp Changer handle inactive layers?

Elastic Comp Changer can offset keyframes in inactive layers, but this requires the keyframe offset option to be enabled first. Alongside that, it can apply changes to both unlocked and locked layers, offset layer and comp markers placed after the playhead, modify layer start times, and move In/Out points while preserving start times. These options let you control exactly which parts of a composition shift when you change its duration.

Alternatives to Elastic Comp Changer

Also in Workflow for After Effects.

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