Unlimited Stacks Mod

Unlimited Stacks

Vanilla caps item stacks at 99. This mod raises that to 1,073,741,823.

No config. No commands. No GUI. Install it and forget about it.

The Problem With Vanilla

Minecraft enforces the stack limit in three separate places. Most mods that claim to remove the cap only fix one or two of them, which means stacks above 99 either:

• Display in-game but silently delete themselves on world save/reload
• Show the right count but can't be placed into containers
• Work fine until you relog, then vanish

This mod fixes all three.

What It Actually Changes

1. Item stack limit Overrides getMaxStackSize() on all non-damageable items at the item level. This is what controls how high a stack can grow in your inventory.

2. Container slot limit Overrides getMaxStackSize() at the container interface level. Without this, slots silently clamp stacks back to the old limit when you move items between inventories.

3. Codec range patch This is the fix most mods miss. Vanilla bakes a intRange(1, 99) validation codec directly into ItemStack.MAP_CODEC at class-load time. Any stack count above 99 fails this validation and is silently discarded when the world saves. This mod intercepts that codec call and expands the accepted range to match the new limit.

Without the codec patch, stacks above 99 disappear when the world saves.

Damageable Items

Tools, weapons, and armour are intentionally excluded. They can't be stacked regardless, and setting a stack size on them triggers Minecraft's internal "item cannot be both damageable and stackable" error. Everything else gets the full limit: blocks, food, materials, misc items.

Stack Limit

The limit is set to Integer.MAX_VALUE / 2 = 1,073,741,823.

This value is used consistently across all three patches so there are no mismatches between what the item allows, what the container allows, and what the save codec accepts.

Use Cases

• Survival or SMP servers running drop multiplier mods
• Creative or admin worlds where large item counts are needed
• Any setup where vanilla's 99-item cap is a bottleneck

Compatibility

Both client and server need the mod installed. The codec patch runs at class-load time on both sides. A server-only install will cause the client to show wrong stack counts.