ItemStacker

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

82 Downloads

fabricgame-mechanicsoptimizationutility

Rent Server with this Mod

Screenshots

About this Mod

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 ... [<new value>].

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

Available Versions

ItemStacker 1.3.1release

MC 1.21.11fabric

June 6, 2026

ItemStacker 1.3.0release

MC 1.21.11fabric

June 6, 2026

How to Install ItemStacker on Your Server

Order Server

Order a Minecraft Java server with at least 3 GB RAM (4 GB recommended).

Set fabric Loader

In the panel under "Egg", select the fabric loader and matching Minecraft version (1.21.11).

Install Mod

Open the mod browser in the dashboard and search for "ItemStacker". Click "Install" – done! Alternatively, upload the .jar via SFTP to the /mods folder.

Compatibility

Mod Loaders

fabric

Minecraft Versions

1.21.11

Server-side

✓ Required

Recommended RAM

4 GB(min. 3 GB)

Frequently Asked Questions

ItemStacker server crashes on startup – what to do?

Most common cause: wrong fabric version or insufficient RAM. Check the server log (latest.log) for "OutOfMemoryError" or "Mixin" errors. With Mado Hosting: ensure at least 3 GB RAM is allocated and the loader matches the mod version (1.21.11). You can switch loaders with one click in the panel.

Is ItemStacker compatible with fabric?

ItemStacker officially supports fabric for Minecraft 1.21.11. The Mado dashboard automatically detects incompatible loader combinations.

Server lagging with ItemStacker – how to optimize performance?

Recommended RAM: 4 GB (per 8 players). Use /spark profiler to check if ItemStacker consumes the most tick time. Common fixes: reduce server view-distance to 8-10, install "performant" or "starlight" as supplementary mods on Forge. With Mado Hosting, your server runs on NVMe SSDs with dedicated CPU cores for minimal latency.