ModsFinder

Mega Stacks

by sniffercraft34

Mega Stacks raises the stack size of items up to 99, so a single slot can hold far more of an item than vanilla allows.

FabricForgeNeoForgeQuiltServer required, client optionalMIT LicenseOpen source1.21.4 – 26.2

What it does

The mod changes how many items fit in one slot, letting players carry more per stack while mining or exploring. A data pack can also make a single item stackable up to 99. Only items picked up or placed as entities take the higher limit when they enter a stack, and items obtained straight from the creative inventory keep the old limits until they are dropped and picked up again. Items that normally stack only to a smaller count, such as doors and swords, are included.

Mega Stacks is server required and client optional, so the server must run it while players may leave it out. A tag file for items can be edited to exclude specific items from the change. Files are published for Fabric, Forge, NeoForge and Quilt for 26.2, and game versions 1.21.4 – 26.2 are covered in 12 release versions. The code is under the MIT License and is open source.

Key features

  1. Stack size up to 99

    Items can be stacked up to 99 per slot instead of their vanilla maximum.

  2. Data pack support

    A data pack can make a single item stackable up to 99 without the full mod.

  3. Exclusion list

    Items can be kept out of the change by editing the not valid tag file.

  4. Higher integer ceiling

    The original design raised the stack limit toward the 32-bit integer maximum, but this version caps stacks at 99.

Compatibility

Latest build for each game version and loader.

26.x4 of 4 versions with builds
26.21.0.0+mod1.0.0+mod1.0.0+mod1.0.0+mod
26.1.21.0.0+mod1.0.0+mod1.0.0+mod1.0.0+mod
26.1.11.0.0+mod1.0.0+mod1.0.0+mod1.0.0+mod
26.11.0.0+mod1.0.0+mod1.0.0+mod1.0.0+mod
1.21.x8 of 8 versions with builds
1.21.111.0.0+mod1.0.0+mod1.0.0+mod1.0.0+mod
1.21.101.0.0+mod1.0.0+mod1.0.0+mod1.0.0+mod
1.21.91.0.0+mod1.0.0+mod1.0.0+mod1.0.0+mod
1.21.81.0.0+mod1.0.0+mod1.0.0+mod1.0.0+mod
1.21.71.0.0+mod1.0.0+mod1.0.0+mod1.0.0+mod
1.21.61.0.0+mod1.0.0+mod1.0.0+mod1.0.0+mod
1.21.51.0.0+mod1.0.0+mod1.0.0+mod1.0.0+mod
1.21.40.1+mod0.1+mod0.1+mod0.1+mod
ReleaseBetaAlphaNot available

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

Use cases

Mining and exploring

Players who carry large amounts of ore or building blocks can fill fewer slots and keep a more organized inventory on long trips.

Server inventories

Server owners can decide which items are affected by editing the tag file, adjusting the stack limit to their own world.

Who it’s for: Players on Fabric, Forge, NeoForge or Quilt who want fewer inventory slots filled. Server owners who manage a shared world and want to control which items can stack higher.

How it compares

Full comparison

Fat Stacks is server required with the same loader set, but its files cover only 1.21.4 – 1.21.6 and it is under a Creative Commons license that is not open source. Sensible Stackables runs on Fabric and NeoForge for 1.21 – 26.3 and needs both client and server, under the MIT License. Lenient Stack Size is server-side only, covers 1.21.10 – 26.2 on Fabric and NeoForge, and is open source under the MIT License.

ModLoadersGame versionsEnvironmentUpdated
Mega StacksFabric, Forge, NeoForge and Quilt1.21.4 – 26.2Server required, client optional2026-06-17
Fat StacksFabric, Forge, NeoForge and Quilt1.21.4 – 1.21.6Server required, client optional2025-01-18
Sensible StackablesFabric and NeoForge1.21 – 26.3Client and server2026-10-05
Lenient Stack SizeFabric and NeoForge1.21.10 – 26.2Server-side only2026-08-02

Questions

Does Mega Stacks need to be installed on the client?

No. The server must run it, while players may leave it out.

Which loaders does Mega Stacks support?

Fabric, Forge, NeoForge and Quilt all have files for 26.2, with the same version 1.0.0+mod.

Why do some items still stack below 99?

Items obtained straight from the creative inventory keep the old limits until they are dropped and picked up again, and items excluded in the not valid tag file are not changed.

In the catalog

Mega Stacks is one of 4,058 Storage mods on ModsFinder, and one of 2,474 Storage mods for Fabric. 13,894 mods support Minecraft 26.2.

Storage mods4,058Fabric modsMods for 26.213,894

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What the author says

This is a data pack that makes every single item be stackable up to 99! You can go mining, exploring or more with a much more organised inventory since slots now hold 30% more items and blocks! This even works with items that can only be stacked to less than 64, like doors and swords. The pack was originally intended…
sniffercraft34, on the Modrinth page

Official listing

Owner
sniffercraft34
Published
2025-12-01
Updated on Modrinth
2026-06-17
Facts verified
2026-10-15

Tags

StorageUtility
Open on ModrinthCompare