
Mousie Builder Toolkit
Mousie Builder Toolkit adds a set of powerful yet easy-to-use tools that make building easier and give you the freedom to create without the usual…
⬇ Download on ModrinthMousie Builder Toolkit is a Fabric mod designed for builders who enjoy precise, flexible, and slightly impossible construction.
Hold Left Alt (default keybind: Open Toolkit) to open Mousie’s menu, then hover over each button for a short description. The mod introduces tools that extend vanilla Minecraft building rules, allowing block placement and editing beyond normal limitations.
The mod works in both single-player and multiplayer. On servers, it must be installed on both client and server, and players require operator permissions to access the full toolkit. Without OP, the menu can still be opened, but tools remain locked.
Current Tools 
- Still Paws – Prevents block updates, physics, fluid ticks, growth ticks, and scheduled block reactions.
- Cheese Logic – Allows block placement without normal support or placement restrictions.
- Extend Tail – Extends block interaction range with selectable distances.
- Ruffled Fur – Adjusts flight speed in Creative and Spectator modes.
- Moon Sight – Toggles Night Vision and detects existing effects from potions or commands.
- Gamemode Buttons – Quickly switch between Survival, Creative, Spectator, and Adventure.
- Cheese Guard, Glowbug & Tweak Stick – Instantly equips or selects Barrier, Light, and Debug Stick items.
More tools and buttons will be added in future updates. Mousie is still conducting experiments that may or may not be safe for block physics.
⚙ Controls: The menu key can be changed in Minecraft controls: Options → Controls → Key Binds → Mousie Builder Toolkit → Open Toolkit. If Mod Menu is installed, keybinds can also be configured through the mod’s settings screen.
License 
This mod is provided for free. It may be used in single-player and multiplayer servers, including modpacks, as long as it is not sold or redistributed as a standalone file.
📬 Feedback
Found a bug or have an idea for a new tool? I'd love to hear your feedback! Please send bug reports and feature suggestions to mousie.academy@gmail.com
- 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 mousie-builder-toolkit-0.1.2.jar — drop this file into the mods folder
- Download size: 164 KB
- Download link checked 24 Aug 2026 — working
These come from our own check of the pack file, not from the source page.