Cloth To Shape Keys - Fix Cloth Animation is a Blender add-on from Recta3D that turns cloth animation into shape keys you can edit by hand. It converts the Cloth, Softbody, and MeshSequenceCache modifiers into shape keys, with MeshSequenceCache covering Alembic imports such as cloth from Marvelous Designer. During conversion it duplicates your object, so you then hide or remove the original mesh, and you edit the resulting shape keys in sculpt mode or edit mode.
Hotkeys let you step through shape keys, with Mouse Button4 going to the previous key and Mouse Button5 to the next, and both can be reassigned. Using the frame step in the output properties Frame Range, you can skip frames while converting. You can also apply a Subdivision Surface modifier to the converted mesh and keep the shape keys with the animation.
Version 1.2.0 adds Blender 5 support and an option to keep or remove the duplicate, adding shape keys directly to the cloth mesh.