UI-Utils

For Minecraft Java Edition

UI-Utils is a security research toolkit for Minecraft Java Edition. It gives your client the control needed to perform basic audits on how a server or plugin handles inventory and packet flow. This tool is only for the client-side half of a plugin pentest. Use it on servers you own or have permission to test.

Early access Early buildNewest UI-Utils updates, along with other projects, are available early for Early Access members on TheBreakery. Get early access on TheBreakery Current Free buildStable The free build, updated once a release is stable. Download on CurseForge

Legacy releases - older builds, no longer supported.

Get it running

UI-Utils needs Fabric. Install all three, then start the game once with the Fabric profile.

STEP 01Fabric Loader

The mod loader itself. Run the installer, then pick the Fabric profile in the Minecraft launcher.

Download Fabric Loader →

STEP 02Fabric API

A required library. Put the downloaded .jar in your mods folder.

Download Fabric API →

STEP 03UI-Utils

The mod. Drop the .jar in the same mods folder and launch the game.

Download UI-Utils →

Where to go next

Documentation

What every button does, how packet delaying works, and the keybindings.

Read the docs →

Discord

Ask questions, report bugs, and discuss findings with other researchers.

Join the server →

Contact & support

Reach the developers directly, or help keep the mod updated.

Get in touch →