While there are paid versions with advanced automation, there are highly-regarded free scripts and versions available:
by entering $0 at checkout. It is known for maintaining layer properties and effects during extraction. MoBar (Free Version)
The Ultimate Guide to Unprecompose in After Effects: Free Plugins, Scripts, and Download Methods unprecompose plugin free best download
It turns a 20-minute copy-paste nightmare into a 2-second click.
It extracts all layers from a nested composition and places them directly back into your main active timeline while retaining keyframes and effects. 🏆 The Best Free Unprecompose Plugins for After Effects While there are paid versions with advanced automation,
For your convenience, here are some verified Unprecompose plugin free best download links:
Beyond the manual method, several other scripts and tools can aid in "un-precomposing": It extracts all layers from a nested composition
Open After Effects, go to Preferences > Scripting & Expressions , and check the box for "Allow Scripts to Write Files and Access Network" .
: Supports modern versions of After Effects, including 2023 and 2022. Alternative: MoBar (Free Version)