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Undo

Undo

A Minecraft Fabric mod that lets players undo world actions with a single key press. Supports reverting block placements, breaks, and state changes like doors and trapdoors.

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Compatibility

Minecraft: Java Edition

26.1.2
1.21.1ā€“1.21.2

Platforms

Supported environments

Client and server

Tags

Creators

Details

Licensed CC-BY-NC-SA-4.0
Published 2 months ago

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Undo Mod ā€” Introduction

A powerful and stable Undo/Redo mod for Minecraft Fabric.

About Undo Mod

Undo Mod provides full Undo and Redo functionality for Minecraft Creative mode players. Whether you misplaced a block, demolished a build by accident, or want to compare different designs ā€” go back to a previous state with a single keypress.

Core Features

  • Undo / Redo ā€” Supports block placement, breaking, and state changes (trapdoors, levers, buttons, etc.)
  • Cascade Reaction Capture ā€” Chain reactions triggered by block changes (falling sand, vine growth, redstone updates, piston pushes) are bundled into a single undo operation
  • BlockEntity NBT Restoration ā€” Chest contents, furnace progress, brewing stand recipes, and more are fully restored
  • HUD Display ā€” Real-time display of undoable/redoable action counts

Operation Modes

Mode Description
Block Only Records only block operations ā€” ideal for builders, leaner history
Full Records block + entity + inventory operations ā€” complete scene recovery

Getting Started

Key Bindings

Key Action
Backspace Undo 1 action
Number(1~100) + Backspace Undo N actions
Shift + Alt + Backspace Undo all
Enter Redo 1 action
Number(1~100) + Enter Redo N actions
Shift + Alt + Enter Redo all
U Open settings
H Open help
Mouse Back Button Undo (must be enabled in settings)
Mouse Forward Button Redo (must be enabled in settings)

Number Input Examples

Press 5 ā†’ Press Backspace ā†’ Undo 5 actions
Press 1 ā†’ Press 0 ā†’ Press Enter ā†’ Redo 10 actions
Press Backspace directly ā†’ Undo 1 action (default)
Shift + Alt + Backspace ā†’ Undo all

Configuration

Without YACL (Basic)

  • Press U to open the vanilla settings screen
  • Options: Mouse Side Buttons toggle, Undo Mode (Full / Block Only)
  • Config file: config/undo-client.json

With YACL (Full)

  • Press U to open the YACL configuration screen
  • Additional options: HUD corner selection, history stats, usage hints

Installation

  1. Install Fabric Loader and Fabric API for your MC version
  2. Place the matching MC version JAR into .minecraft/mods/
  3. (Optional) Install YACL v3 for the full config GUI, or download the -bundled JAR
  4. Launch the game and press U to configure

Dependencies

Component Main JAR Bundled JAR
YACL v3 Recommended (install separately) Built-in
Fabric API Required Required

Tech Stack

  • Loader: Fabric
  • Java: ā‰„ 21
  • Build: Gradle + Fabric Loom