FatStack
🟡 Updated this year⚠️ Install Order · 2 steps
Install in this order, then this mod last — most mods fail to load without their framework and dependencies in place.
Preview

🔍 Analysis
- 👍 0.2% endorsement rate
- 🏆 #207 of 307 equipment mods in this game by downloads
📋 About This Mod
FatStack adds a config file to change the default max stack size for all items.
At startup it'll generate a config file with a set of defaults, and that config file can be changed to change the default max stack size of any item.
The mod can be run purely on the server, and when items are sent to the client they spoof the `minecraft:max_stack_size` item component, so the clients are notified of the changes.
📊 Mod Details
- Game
- Minecraft Mods
- Author
- Octal
- Version
- 1.1+mc.1.21.10
- Downloads
- 505
- Endorsements
- 1
- Category
- equipment
- Created
- 10/6/2025
- Updated
- 10/19/2025
- Game Versions
- 1.21.9, 1.21.10
- Tags
- equipment, management, utility
🔧 How to Install Minecraft Mods Mods
Download from Modrinth. Use Prism Launcher or drop into your mods folder.
📖 Full step-by-step install guide for Minecraft Mods →
Visit the official mod page for specific installation instructions for this mod.
🎮 Need cheat codes or console commands? Check ur gaming wiki for Minecraft Mods commands, item IDs, and more.
❓ Frequently Asked Questions
Which Minecraft Mods versions does FatStack support?
The author lists 1.21.9, 1.21.10. Other versions may work but are untested by the author.
What is the latest version of FatStack?
Version 1.1+mc.1.21.10, published 2025-10-19 with 505 downloads recorded at the source.
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