Build undo
Java mod listed for Minecraft 1.21. Downloads from the MC Java Mods app on Android.
⬇ Download on Modrinth
Build Undo is a lightweight quality-of-life Fabric mod for builders who sometimes place a block in the wrong spot and want a quick, fair way to fix it.
The mod tracks your own successful block placements and lets you undo or redo them with keybinds. It is designed to feel like a small building helper, not a cheat tool or WorldEdit replacement.
Features
Undo your own recently placed blocks Redo blocks you just undid Per-player placement history Configurable history size Configurable undo/redo distance Optional item return in Survival Optional sound and particle effects In-game settings screen Server-side safety checks No undo for blocks changed after placement No undo for naturally generated blocks or other players’ blocks Default Keybinds
Z: Undo last placed block Y: Redo last undone block U: Open Build Undo settings Commands
/buildundo undo /buildundo redo /buildundo config show /buildundo config history <1-1000> /buildundo config distance <0-256> /buildundo config returnItems <true|false> /buildundo config effects <true|false> Use distance 0 for unlimited range.
Compatibility
Minecraft (show versions) Fabric Loader Fabric API required
- Edition: Minecraft Java
- File type: .jar
- Minecraft version listed: 1.21.11
- How to install: Install the matching mod loader (Forge, Fabric or NeoForge) for your Minecraft version. → Download the .jar. → Put it in the .minecraft/mods folder and launch that loader profile.
- Where to get it: Opens on Modrinth — not every file is mirrored on our own servers.
Install steps are the general flow for this file type — How to install Minecraft Java mods & modpacks walks through it step by step.
- Ships as build-undo-1.0.0.jar — drop this file into the mods folder
- Download size: 19 KB
- Download link checked 23 Oct 2026 — working
These come from our own check of the pack file, not from the source page.