Rig UI Pro is an add-on that enables riggers and animators to build custom interface panels for their armatures directly within the 3D viewport or sidebar. It provides a configurable system for managing bone collections, visibility states, and custom properties, allowing users to group controls using various UI styles like collapsible boxes and labels.

The tool includes specialized systems for animating, such as a one-click IK/FK matching mechanism that aligns limbs when swapping modes, and a parent switcher for changing child-parent relationships and baking animations. It also features visibility bookmarks to save and recall bone collection states, mask modifier toggles tied to the armature, and dedicated integration panels for popular rigging systems like Auto-Rig Pro and Rigify.