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AggStack project artwork

Modrinth · Minecraft mod

AggStack

AggStack allows you to store multiple items with the same ID but different NBT data (durability, enchantments, etc.) in a single inventory slot, with an expandable panel to view and manage all sub-items.

Choose a version Pick your version below, then grab the matching file.

Quick answer

Which AggStack release matches 1.21.1?

Updated 3 days ago
Best match for your filters 1.3.0
Game version 1.21.1
Loader Fabric

AggStack 1.3.0 targets 1.21.1 with Fabric. Installation on the client is optional. Installation on the dedicated server is optional. No extra mods listed for this file.

Where it goes

Is AggStack required on the client, server, or both?

Installation on the client is optional. Installation on the dedicated server is optional.

Client Optional
Dedicated server Optional
Loader for this release Fabric
Required install it here Optional supported, not mandatory Not supported do not install here Source doesn’t say do not assume

The source marks this as usable on both the client and server.

Understand client and server requirements Read the Minecraft installation guide

What else does AggStack 1.3.0 need?

1.3.0 on 1.21.1. Every mod below is checked against that same setup.

No extra mods listed for this file

This file does not list any required mods. Do not add a library just because a different file uses it.

This file does not list any required or optional mods.

Before you install it

Add AggStack without breaking your instance.

Built for AggStack 1.3.0 on 1.21.1. Pick another file and the loader, install side or required mods may change.

  1. 01

    Stick to this file

    Use 1.3.0. It targets 1.21.1 with Fabric; another release may have different loader, side or dependency requirements.

  2. 02

    Bring the mods it needs

    This file does not list any required mods. Do not add a library just because a different file uses it.

  3. 03

    Put it on the correct side

    Installation on the client is optional. Installation on the dedicated server is optional.

  4. 04

    Pick the file you checked

    Use the “Get this file” button beside 1.3.0. It opens that exact file at the source.

About this project

What does AggStack add?

AggStack

What is AggStack?

AggStack allows you to store multiple items with the same ID but different NBT data (different durability, enchantments, or custom names) in a single inventory slot.

💡 Example: Store a 5% durability diamond pickaxe and a 100% durability diamond pickaxe in the same slot!

🎮 How to Use

Creating an Aggregated Stack

Method How to do it
Drag to Merge Pick up an item with your mouse, then drag and drop it onto another item of the same type (e.g., two iron pickaxes with different durability). They will merge into an aggregated stack.
Auto Pickup If you already have an aggregated stack in your inventory, picking up the same type of item will automatically add it to the stack. (Can be disabled in config)

Viewing Sub-items

  1. Hover your mouse over an aggregated stack slot
  2. Hold Left Alt (default) – a panel will appear below your inventory
  3. The panel displays all sub-items in a 7-column grid, each showing its own durability bar and enchantment glint
  4. Release Left Alt – the panel closes

🔧 You can change the expand behavior in config: HOLD / TOGGLE / CLICK_OUTSIDE

Interacting with Aggregated Stacks

Action Result
Left Click (on the stack) Pick up the entire aggregated stack (all sub-items)
Right Click (on the stack) Take half of the top item (if stackable), or the whole top item (if unstackable)
Shift + Left Click Split the stack – all sub-items scatter into your inventory (or drop on the ground if inventory is full)
Q (Drop) Drop the entire aggregated stack as a single item

Interacting with Sub-items (in the expanded panel)

Action Result
Left Click on a sub-item Take that single sub-item out – it will appear on your mouse cursor
Right Click on a sub-item Set that sub-item as the new top item (changes the appearance, durability bar, and enchantment glint)

Adding Items to an Existing Stack

  1. Pick up an item with your mouse (must be the same type as the aggregated stack)
  2. Right-click on the aggregated stack
  3. The item is added as a new sub-item

⚙️ Configuration

Press G in-game to open the configuration GUI.

Option Description Default
Enabled Enable/disable the entire mod true
Max Sub-Items Maximum items per aggregated stack (1-64) 64
Auto Pickup Automatically merge picked-up items true
Expand Key Key to open the sub-item panel Left Alt
Expand Behavior HOLD = hold to open, release to close / TOGGLE = press to toggle / CLICK_OUTSIDE = click outside to close HOLD
Death Drop SPLIT = drop all sub-items separately / KEEP_ALL = drop as a single stack SPLIT
Creative Auto Stack Auto pickup in creative mode (disabled by default) false
Split Key Modifier key for splitting aggregated stacks Left Ctrl

🚫 Restrictions

Aggregated stacks cannot be placed into the following container slots (to prevent bugs/exploits):

  • Crafting Table • Furnace/Smoker/Blast Furnace • Brewing Stand
  • Villager Trading • Grindstone • Anvil • Smithing Table
  • Stonecutter • Loom • Cartography Table

✅ You can still take out aggregated stacks from these containers.

Project description from Modrinth.

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AggStack by Minecraft version and loader

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1 available setups

Check the dependencies, then try the file in a copied instance before changing a world you care about.

Recent files

AggStack versions and loaders

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