ItemStacker

Adds a QoL system that merges identical blocks and items into stacks and displays total counts.

by zimao116Game mechanics Optimization Utility

Fabric

Loaders: Fabric
Downloads on Modrinth: 824
Followers on Modrinth: 3
versions: 5
Updated: June 6, 2026Jun 6
Published: in 2026

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At a glance

Runs on Fabric

For Minecraft 1.21.11

Server only — players don't need to install it

Latest version — 1.3.1+1.21.11 from June 6, 2026

License MIT — free

Where it's needed

In gamenot neededOn serverrequired

Install on the server only; players don't need it

Game versions1.21.11

ItemStacker

Adds various improvements to block and item merging for better performance and behavior. This mod works on both server-side and singleplayer.

Note: ItemStacker modifies the vanilla item merging system and only works in server-side environments and singleplayer.

Features

Adds item name and stack count information to merged items:
Improves item merging and makes it faster:

Mod Version (1.3.x)

Command	Permission	Short Description
/itemstacker settings	`Singleplayer: everyone / Multiplayer: OP only`	Change settings like radius, delay and more

General Settings

To change a setting, enter `/itemstacker settings ... []`.

Setting	Description	Default
`maxStack`	Maximum number of items that can be stacked together	`32768`
`mergeRadius`	Radius used to search for nearby items to merge.	`6`
`mergeDelay`	Delay between merge operations (in ticks).	`2`
`symbol`	Symbol displayed before item count	`▶`
`symbolColor`	Color of the item count symbol.	`yellow`

OP players have all permissions. Singleplayer users can configure everything without additional permissions.

Mod Version (1.2.x)

Command	Permission	Short Description
/itemstacker maxstack	`Singleplayer: everyone / Multiplayer: OP only`	Set maximum stack size

FAQ

How to install ItemStacker?

Install Fabric for your Minecraft version, download ItemStacker for the same version and loader, put the file into the mods folder and launch the game with the loader profile.

Which Minecraft versions does ItemStacker support?

ItemStacker has builds for Minecraft 1.21.11.

Is ItemStacker needed on the server?

Server only — players don't need to install it

License and source

MIT Licensefree to use and share with credit to the author

Original — Modrinth↗Files unchanged, verified with SHA-512Is this your mod? For rights holders