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Key Range Scaler

by Chris Williamson·Workflow

Images © Chris Williamson. Used for product review; image policy.

Why we like it

Listed on Superhive, Key Range Scaler stands out for its take on keyframe scaling — anchoring one end of a range while adjusting the other, with Bezier handles scaled alongside.

What is Key Range Scaler?

Key Range Scaler offers an alternative approach to scaling keyframes in Blender. You select a range of keyframes and scale them from one end while the other end stays fixed, comparable to proportional scaling in After Effects. The current frame is left unchanged throughout.

Modifier keys refine the behaviour: hold Alt to snap the end of the range to your cursor, Ctrl to snap to exact frames, and Shift for slower, finer scaling. Bezier handles are scaled at the same time, which keeps the animation consistent and prevents overshoot glitches.

The add-on is Blender Extension compatible, published as an add-on under the GPL license, and comes with documentation. It targets f-curve and dopesheet retiming for animators who want more flexibility when adjusting timing across a selection of keyframes.

Who is Key Range Scaler best for?

Key Range Scaler is best for blender animators retiming a selection of keyframes in the f-curve editor or dopesheet without shifting the current frame.

How much does Key Range Scaler cost?

Key Range Scaler is completely free to download and use.

Key features

  • Scales a range of keyframes from either the start or end while keeping the opposite end fixed
  • Adjusts timing without changing the current frame
  • Alt snaps the end of the range to your cursor; Ctrl snaps to exact frames
  • Shift enables slower, finer scaling
  • Scales Bezier handles at the same time to keep animation consistent and prevent overshoot glitches
  • Documentation included

Tags

#blender#keyframes#retiming#animation#f-curve#dopesheet#workflow

Frequently asked questions

What Blender versions does Key Range Scaler support?

Key Range Scaler lists support for Blender 4.3 and 4.2. It is Blender Extension compatible and distributed as an add-on, so it installs through Blender's add-on system. If you are running a different Blender version, check the developer's page before installing to confirm compatibility, since only 4.3 and 4.2 are named here. The extension type and version details are provided directly by the developer.

How do the modifier keys work in Key Range Scaler?

Key Range Scaler uses three modifier keys while scaling. Hold Alt to snap the end of the range to your cursor, hold Ctrl to snap to exact frames, and hold Shift for slower, finer scaling. These modifiers give you additional control over how the selected keyframe range is adjusted. Bezier handles are scaled at the same time, keeping the animation consistent and stopping overshoot glitches during the operation.

Is Key Range Scaler free?

Key Range Scaler is listed as free in this catalog. It is published under the GPL license as a Blender add-on. Because licensing and pricing can change over time, check the developer's page for the current terms before you download. The add-on also includes documentation, which is worth reviewing to get familiar with how the scaling behaviour and modifier keys work in your projects.

Does Key Range Scaler change the current frame while retiming?

Key Range Scaler does not change your current frame while scaling. You select a range of keyframes and scale them from either the start or end of the range, keeping the opposite end in place, all without moving the current frame. This is described as an alternative to standard keyframe scaling and is comparable to proportional scaling in After Effects, aimed at f-curve and dopesheet retiming.

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