DatapacksJava
Piston Shrinking
I don't know my version or loader
Open the Minecraft launcher and look at the profile you play on — it names both, like fabric-loader-1.21.4. The version also shows in the bottom-right corner of the game's main menu.
No loader in the profile name? Then it's plain Minecraft, and these mods won't run — you need Fabric or NeoForge installed first.
Shrink Datapack by Pious
With this Datapack you can shrink yourself and mobs with pistons. To shrink you need to stand under a piston and extend it. To grow you need to stand under a sticky piston and retract it.
- Stand under a slab which is one block above you and extend the piston to shrink to 0.75 size.
- Extend the piston to shrink to 0.5 size.
- Stand under a slab and extend the piston to shrink to 0.25 size.
- Stand under a cauldron while you are 0.25 size and extend the piston to shrink to 0.01 size.
Have Fun :D
Quick facts
- Edition: Minecraft Java
- File type: .jar
- Minecraft versions listed: 26.1, 26.1.1, 26.1.2
- 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 — see the MC Java Mods guides for the full walkthrough.
Verified by MCModsHub
- Downloads as PiousPistonShrinking.zip
- Download size: 60 KB
- Download link checked 29 Aug 2026 — working
These come from our own check of the pack file, not from the source page.