GUI Inspector

Tool developers use GUI Inspector to examine the graphical user interfaces of Minecraft. The tree view lists every widget and component on the open screen, with class names and their properties. Class and method names are shown with Yarn Mapping names, so the output reads the same on unobfuscated builds. Most properties can be viewed and changed, including many that are normally immutable, and an element can be removed from the screen entirely. Changes made this way are permanent for the session.

The mod is aimed at developers building or customizing interfaces, and at people who want to adjust their own GUI. An inspector mode lets a player click any element directly in the game, which highlights the matching node in the tree. Selecting an element outlines it on screen so it can be identified. A more detailed capture records draw calls, property values and call stacks for the texture or render call that produced a given element, where that applies.

GUI Inspector needs only Fabric, and it runs on the client alone, so a server does not need it. Files are published for Fabric across 14 release versions, 1.20 – 26.2, and the latest build targets 26.2 under the MIT License, which makes the code open source.