Stack99
A simple stack size mod that increases item stacks to Minecraft's maximum limit of 99 with easy in-game configuration.
介绍
Stack99
A simple NeoForge mod for Minecraft 1.21.1 that increases item stack sizes to Minecraft’s maximum limit of 99 items.

Features
- 2 Configuration Options: VANILLA (64) or MAX (99)
- Works Immediately: Default is MAX – install and play
- 1150+ Items: Automatically modifies all stackable vanilla and modded items
- GUI Configuration: Easy in-game config screen
- Modern Implementation: Uses Minecraft 1.21.1’s Data Components system
- Universal Compatibility: Works with all modded items
Compatibility
✅ All vanilla items
✅ All modded items (Create, Mekanism, AE2, etc.)
✅ Multiplayer compatible
✅ No conflicts with other mods
FAQ
Q: Why only 99?
A: Minecraft 1.21.1 has a hard-coded limit of 99 items per stack. Higher values get clamped to 99 by the game engine.
Q: Does this work with modded items?
A: Yes, automatically applies to all stackable items.
Q: Do I need to restart after changing config?
A: Yes, stack sizes are set during world initialization.
Requirements
- Minecraft: 1.21.1
- Mod Loader: NeoForge 21.1.73+
- Java: 21
常见问题
Stack99 支持哪些 Minecraft 版本?
Stack99 支持 Minecraft Java 版 1.21.1,可用的加载器:NeoForge。下载时注意选择和你游戏版本一致的文件。
Stack99 怎么安装?
先用 PCL2 或 HMCL 启动器安装对应版本的 NeoForge,再把下载的 .jar 文件放进游戏目录的 mods 文件夹,重新启动游戏即可。开启了版本隔离的,mods 文件夹在 versions/版本名 下面。
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