Ferret Marker is a free After Effects plugin that searches a timeline for a specified value and adds markers at each occurrence, offering linear or cubic spline interpolation methods for different animation types.
Developed by Nicolas Dupouy-Manescau.

About Ferret Marker
Ferret Marker searches a timeline in After Effects for a user‑specified value and places markers wherever that value appears. Users enter the target value in an edit box, then select one of two analysis methods from a dropdown. Linear Interpolation provides a generic, stable approach, while Cubic Spline Interpolation offers higher accuracy for smooth animations driven by expressions or Easy Ease keyframes. Version 1.0 was released in December 2023 and supports After Effects releases from CS3 through the 2026 version. The plugin is listed as free, with an optional tip for the developer.
Features
- Locates all occurrences of a target value on the timeline and adds markers on them
- Target value editbox for specifying the value you want to identify instances of
- Two selectable timeline analysis methods via a dropdown list
- Linear Interpolation, described as a generic and stable research method
- Cubic Spline Interpolation, an accurate research method for smooth animations set with expressions and keyframes with Easy Ease
- Broad After Effects compatibility spanning CS3 through the 2026 version
Best for
After Effects users who need to locate and label every instance of a specific value across the timeline.
Frequently asked questions
What After Effects versions does Ferret Marker support?
Ferret Marker supports After Effects versions from CS3 up through the 2026 release, including CC and the yearly versions from 2020 to 2026.
What is the difference between the two sampling methods in Ferret Marker?
The plugin offers two sampling methods: Linear Interpolation, described as a generic and stable analysis, and Cubic Spline Interpolation, described as a more accurate method for smooth, expression‑driven or Easy‑Ease keyframe animation.
Is Ferret Marker free to use?
Ferret Marker is listed as free to use; the developer may accept optional tips, but payment is not required.
Related plugins
Explore Ferret Marker
View download and installation options.