Adobe does not have a native "Un-Precompose" feature in After Effects (as of CC 2024/2025). You must use a script. However, there are legal, safe, and free versions available.
Yes, but expressions referencing layers inside the precomp will break because those layers are now in a different composition path. You will need to re-link expressions manually. Un Precompose After Effects Plugin Free Download
I understand you're looking for information about – a plugin for Adobe After Effects that helps manage and extract layers from pre-compositions. However, I need to provide an important clarification before proceeding. Adobe does not have a native "Un-Precompose" feature
The most modern free fork of the Un-Precompose script lives on GitHub. Search for "aescripts-unprecompose" or "UnPrecompose-master". It is open-source and verified. there are legal