ModsFinder

Tag Stack

by macuguita

Tag Stack lets server owners set how many items stack together by assigning each item to a stack-size tag.

FabricQuiltServer-side onlyMIT LicenseOpen source1.20.1 – 1.21.5

What it does

Tag Stack changes item stack sizes through item tags. A datapack tag under the stack namespace, such as stackable 16, lists the items that should use that maximum, so the size is set in data rather than in code. Eight tags cover sizes from 1 up to 64, and a single tag file can name any items in the game, including modded ones.

The mod is a Fabric mod that requires Fabric API and also runs on Quilt. Players join without it, since only the server has to run the mod. Builds cover 1.20.1 – 1.21.5 across ten release versions, and the latest file targets 1.21.5. The code is open source under the MIT License.

Key features

  1. Tag-based stack sizes

    Each item is assigned a maximum stack size by placing it in a tag, with no separate configuration per item.

  2. Eight stack-size tags

    Tags for 1, 2, 4, 8, 16, 32 and 64 items let the owner choose the limit for any group of items.

  3. Editable tag files

    Items are added to a tag by editing a JSON file in the datapack, so changes need only a reload.

  4. Modpack tuning

    Modpack builders and server owners can tweak stack sizes across a whole pack without touching game code.

Compatibility

Latest build for each game version and loader.

1.21.x6 of 6 versions with builds
1.21.51.0.0+1.21.11.0.0+1.21.1
1.21.41.0.0+1.21.11.0.0+1.21.1
1.21.31.0.0+1.21.11.0.0+1.21.1
1.21.21.0.0+1.21.11.0.0+1.21.1
1.21.11.0.0+1.21.11.0.0+1.21.1
1.211.0.0+1.21.11.0.0+1.21.1
1.20.x4 of 4 versions with builds
1.20.41.0.0+1.20.11.0.0+1.20.1
1.20.31.0.0+1.20.11.0.0+1.20.1
1.20.21.0.0+1.20.11.0.0+1.20.1
1.20.11.0.0+1.20.11.0.0+1.20.1
ReleaseBetaAlphaNot available

Only full game releases are shown. This mod publishes no snapshot builds.

Requirements

Dependencies declared by the latest file for each loader.

Required 1

Fabric APILightweight and modular API providing common hooks and intercompatibility measures utilized by mods using the Fabric toolchain.
Required

Use cases

Modpack stack tuning

A modpack team can raise or lower stack sizes for whole groups of items in one place.

Server-side balancing

A server owner can change how many items fit in one slot while players keep their vanilla client.

Who it’s for: Server owners and modpack builders who want to change item stack sizes through tags, rather than players who want a client-side change.

How it compares

Full comparison

Stackable Heads is a Fabric, Forge, NeoForge and Quilt mod for 1.21 – 1.21.8 that only the server requires, and it is licensed under the GNU Lesser General Public License v3.0 only, so it is not open source. One Stack Size is a Fabric mod for 1.20 – 1.21.1 that both client and server run, and it is All rights reserved, so it is not open source. FatStack is a server-side Fabric mod for 1.21.9 – 1.21.10 under the Mozilla Public License 2.0, which is open source.

ModLoadersGame versionsEnvironmentUpdated
Tag StackFabric and Quilt1.20.1 – 1.21.5Server-side only2025-04-19
Stackable HeadsFabric, Forge, NeoForge and Quilt1.21 – 1.21.8Server required, client optional2025-06-30
One Stack SizeFabric1.20 – 1.21.1Client and server2025-06-02
FatStackFabric1.21.9 – 1.21.10Server-side only2025-10-19

Questions

Does Tag Stack need Fabric API?

Yes. Fabric API is required, and the mod loads on Fabric or Quilt.

Does every player need Tag Stack installed?

No. Only the server needs it, and players join without installing anything.

How is a stack size assigned to an item?

The item is added to a stackable tag, such as stackable 16, in a JSON tag file under the stack data namespace.

In the catalog

Tag Stack is one of 8,016 Management mods on ModsFinder, and one of 5,930 Management mods for Fabric. 15,307 mods support Minecraft 1.21.5.

Management mods8,016Fabric modsMods for 1.21.515,307

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What the author says

The Tag Stack mod allows you to control how many items can stack together by using simple item tags. Perfect for modpacks or servers where you want to tweak item stack size.
macuguita, on the Modrinth page

Official listing

Owner
macuguita
Published
2025-04-19
Updated on Modrinth
2025-04-19
Facts verified
2026-10-15

Tags

Game mechanicsManagement
Open on ModrinthCompare