Activate the Constant Key Reducer filter to remove redundant keys. Redundant keys are keys that have the same value, which are equivalent to flat horizontal interpolations on a curve. Redundant keys are often a result of a resampled curve.

Before:

After:

You can set specific thresholds for each type of transform (Transformation, Rotation, Scaling, and Other. Other includes Morph and custom attribute curves, for example).

The default values are:

Values represent generic units. This is why you might need to modify threshold values in relation to the world scale of your scene. This is true for very large or small scale scenes.

If keys are numerically identical, use very small values to ensure that no animation is lost.

If you use this filter to eliminate noise, for example, from motion capture data, then you might need to modify values.