DatapacksJava
OneStackMax
Java data pack listed for Minecraft 1.21–26.x. Downloads from the MC Java Mods app on Android.
⬇ Download on Modrinth
Not much to say here!
It is pretty basic mechanic: makes all items unable to stack with eachother, making game much harder!
Tested on 1.21.7 version of minecraft, not sure about 26+ versions of minecraft
Quick facts
- Edition: Minecraft Java
- File type: .jar
- Minecraft versions listed: 1.21.5, 1.21.6, 1.21.7
- 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.
File checked by MCModsHub
- Downloads as OneStackMax-v1.0.0.zip
- Download size: 702 KB
- Download link checked 25 Oct 2026 — working
These come from our own check of the pack file, not from the source page.