If you are looking for a specific script to perform these tasks, two of the most popular community-standard tools are:
The most critical feature is the ability to drill down through every nested pre-comp and scale them proportionally. Infinite Resize Script
These scripts solve a fundamental After Effects limitation: the built-in "Scale Composition" script only resizes the active composition and its top-level layers, leaving nested "pre-comps" at their original, often incorrect, resolution. If you are looking for a specific script
A "name your own price" tool available on aescripts.com. It is widely used for batch-resizing keyframes, vectors, and 3D layers recursively. It is widely used for batch-resizing keyframes, vectors,
Created by Sergei Prokhnevskiy, this script offers a simplified UI with three buttons for creating adaptive motion graphics across different aspect ratios. Potential Limitations Quick Tip: How to Resize a Composition in After Effects