Illegal Stack Fixer

Resets stack count to maximum stack size

2.3K Downloads

fabricforgequiltutility

Rent Server with this Mod

About this Mod

Illegal Stack Fixer

Requires the Fabric Loader and Fabric API

A Fabric Minecraft server to use the mod on

Setup

Drop the mod in the server mods folder

Details

Illegal Stack Fixer is a server-side mod to set the stack size of any stack to the maximum stack size if the stack size is too big.

It detects all invalid stack sizes from chests-like blocks and entities with storage upon any non-creative player opening the inventory.

Download

Available Versions

illegal_stack_fixer-mc1.20.4-1.0.1-build.10.jarrelease

MC 1.20.4fabric, forge, quilt

January 19, 2024

illegal_stack_fixer-mc1.20.2-1.0.0-build.7.jarrelease

MC 1.20, 1.20.1, 1.20.2, 1.20.3, 1.20.4fabric, forge, quilt

January 8, 2024

illegal_stack_fixer-mc1.20.2-1.0.0-build.6.jarrelease

MC 1.20, 1.20.1, 1.20.2, 1.20.3, 1.20.4fabric, forge, quilt

January 8, 2024

illegal_stack_fixer-mc1.20.2-1.0.0-build.4.jarrelease

MC 1.20.2fabric, forge, quilt

October 3, 2023

illegal_stack_fixer-mc1.20-1.0.0-build.2.jarrelease

MC 1.20, 1.20.1, 1.20.2fabric, forge, quilt

July 2, 2023

How to Install Illegal Stack Fixer 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 (1.20.4).

Install Mod

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

Compatibility

Mod Loaders

fabricforgequilt

Minecraft Versions

1.20.4, 1.20.3, 1.20.2 (+7 more)

Server-side

✓ Required

Recommended RAM

4 GB(min. 3 GB)

Frequently Asked Questions

Illegal Stack Fixer 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 (1.20.4). You can switch loaders with one click in the panel.

Is Illegal Stack Fixer compatible with fabric and forge and quilt?

Illegal Stack Fixer officially supports fabric, forge, quilt for Minecraft 1.20.4, 1.20.3, 1.20.2. Note: Forge and Fabric mods are NOT cross-compatible – pick one loader and stick with it. The Mado dashboard automatically detects incompatible loader combinations.

Server lagging with Illegal Stack Fixer – how to optimize performance?

Recommended RAM: 4 GB (per 8 players). Use /spark profiler to check if Illegal Stack Fixer 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.