FlexKit is an animation export extension that samples armature bones and mesh shape-keys directly from a Blender scene to generate XAF and XPF files for IMVU. It allows users to bypass the standard FBX import process, offering near real-time iteration updates in both the IMVU Classic Client and IMVU Studio.

The tool features an adjustable temporal sampling resolution and post-processing algorithms to optimize file sizes without relying on external hardcoded parsing. Users can selectively export specific bones or shape-keys for modular animation creation. It functions independently but can also integrate alongside the IMVU Studio Toolkit for Blender.