CurseForge · Minecraft mod
StackUpper
Increase item stack with custom rule support!
Quick answer
Which StackUpper release matches 1.21.11 NeoForge?
StackUpper 1.21.10-2.0.9 targets 1.21.9, 1.21.10, 1.21.11 with NeoForge. The project page does not say whether this file belongs on the client, dedicated server, or both. No extra mods listed for this file.
Where it goes
Is StackUpper required on the client, server, or both?
The project page does not say whether this file belongs on the client, dedicated server, or both.
The source does not explicitly classify this release as client-only or server-only.
What else does StackUpper 1.21.10-2.0.9 need?
StackUpper 1.21.10-2.0.9 on 1.21.11 NeoForge. Every mod below is checked against that same setup.
This file does not list any required mods. Do not add a library just because a different file uses it.
This file does not list any required or optional mods.
Before you install it
Add StackUpper without breaking your instance.
Built for StackUpper 1.21.10-2.0.9 on 1.21.11 NeoForge. Pick another file and the loader, install side or required mods may change.
- 01
Stick to this file
Use StackUpper 1.21.10-2.0.9. It targets 1.21.9, 1.21.10, 1.21.11 with NeoForge; another release may have different loader, side or dependency requirements.
- 02
Bring the mods it needs
This file does not list any required mods. Do not add a library just because a different file uses it.
- 03
Put it on the correct side
The project page does not say whether this file belongs on the client, dedicated server, or both.
- 04
Pick the file you checked
Use the “Get this file” button beside StackUpper 1.21.10-2.0.9. It opens that exact file at the source.
About this project
What does StackUpper add?
A NeoForge mod that allows changing item stacksize up to 2^31-1, with custom rules.
Scripting
https://github.com/MaiKokain/StackUpper/wiki/Scripting
Note
Project description from CurseForge.
Pick your setup
StackUpper by Minecraft version and loader
Choose the version and loader you play, then open the matching release.
26.1.1
1 loader build26.1
1 loader build1.21.11
1 loader build1.21.10
1 loader build1.21.9
1 loader build1.21.8
1 loader build1.21.7
1 loader build1.21.6
1 loader build1.21.5
1 loader build1.21.4
1 loader build1.21.3
1 loader buildShowing the newest 12 of 17 game versions. Older files are in the list below.
Check the dependencies, then try the file in a copied instance before changing a world you care about.
Recent files
StackUpper versions and loaders
StackUpper 1.21.10-2.0.9
stackupper-2.0.9-1.21.10.jar
6 Jan 2026
Looking for an older file? The official CurseForge project page is in Resources.