Stack Size 1024

Choose the maximum stack size for normal Minecraft items on Fabric 1.21.11, from the vanilla value up to 8192.

This mod is made for players who want larger, cleaner storage without changing every special-case item in the game.

Features

• Lets you choose the maximum stack size for items that normally stack to 64 or 16
• Available options:
  • Vanilla
  • 128
  • 256
  • 512
  • 1024
  • 2048
  • 4096
  • 8192
  • Adds a settings screen in Mod Menu
  • Keeps items with special limits like 1 unchanged
  • Raises inventory slot limits together with the selected stack size
  • Syncs the active value from server to player in multiplayer
  • Fixes the save/load validation problem that can cause large stacks to be skipped during save

How It Works

If Mod Menu is installed, you can change the stack size from the mod settings screen.

In singleplayer, your selected value is used for your world.

In multiplayer, the server's value becomes the active one while you are connected, so everyone uses the same limit.

Compatibility

• Minecraft: 1.21.11
• Loader: Fabric
• Requires: Fabric API
• Optional: Mod Menu

Important Notes

• This mod only changes normal stackable items.
• Items that are normally non-stackable are left alone.
• Very large stack counts can still look a bit cramped in some vanilla screens because Minecraft was originally designed around smaller numbers.
• If you lower the selected stack size later, already existing large stacks are kept, but new merging follows the currently selected value.

Why This Mod Exists

Most stack size mods only raise the visible limit and stop there. This mod also handles the save/load side more carefully, so larger stacks are much safer to use in real worlds.