The "verified" status of extraction tools stems from the simplicity of the underlying format. A user can verify the integrity of a .chkn file by performing the following:
Sometimes you don't need a full "extractor" to get what you need. You can often retrieve your own textures directly from your IMVU project folders. When you open a project in the Classic Create Mode, IMVU downloads the assets to a temporary folder on your PC, allowing you to grab the flat texture files for quick edits. A Note on Safety and Ethics imvu chkn extractor verified