Source-provided project description. FreeMinecraftMods keeps creator credit and adds separate compatibility and decision guidance below.

Project overview

BlockUI is an XML based UI management system for minecraft. Defines the structure for the UI inside an XML while providing a backing "Window" class that is used to handle callbacks and data supply. It has been used in numerous past projects like Structurize and MineColonies and is now also used in projects like StorageRacks and MultiPiston. It is continuously updated and supports a broad selection of UI tools: - Images - Buttons and Button Handlers - Text Input - Scroll and DragScreens - And more. You can rent an easily configurable server with our Partner BisectHosting. Click on the picture above, select a plan(at least 4GB) and use our code ldtteam to get 25% off your first month and Minecolonies with your friends.

FreeMinecraftMods decision guide

This mod is most relevant to players looking for API and Library on NeoForge, Forge, undefined. Treat those labels as discovery hints, then verify the exact file and dependency list on the official project page.

The source record was updated on Mar 21, 2026. Check the changelog and file page to see whether that update applies to the version and loader you plan to use.

What to verify before choosing a file

Confirm that the file is published by the credited creator on the linked official source.
Match the Minecraft version exactly instead of relying only on a broad category label.
Read dependencies, incompatibilities, and changelog notes before updating an existing instance.
Match the loader or server platform and its required version. Forge and NeoForge are not interchangeable.
Back up worlds and configuration files before testing the project in a long-term save or public server.

Compatibility at a glance

Minecraft versions in this snapshot: 1.21.1, 1.20.1, 1.21, 1.20.4, 1.19.2, 1.19.4, 1.20, 1.18.1, 1.18.2, 1.19.3, 1.19.1, 1.19

Loaders and platforms: NeoForge, Forge, undefined

API and Library

Before you install

Match the exact Minecraft version and loader, install every required dependency, and test in a separate profile before opening an important world. Keep a backup before changing a working mod list.

Source, licensing, and corrections

FreeMinecraftMods does not mirror the project files. Use the official source for downloads, release notes, dependencies, support, and licensing details. Project names, images, and creator-written descriptions remain the property of their respective owners.

How listings are reviewed | Report incorrect project information | Rights-holder and DMCA information

Limited catalog information

This source record is available for discovery, but it does not yet contain enough verified description, classification, image, freshness, or compatibility information to be indexed as a full editorial page. It is therefore marked noindex and is not eligible for advertising.

BlockUI