
Modrinth · Minecraft mod
Just Utilities
A personal use Mutliloader Modding API
Quick answer
Which Just Utilities release should I use?
Just Utilities 21.1.2 targets 1.21.1 with Fabric. Installation on the client is optional. Installation on the dedicated server is optional. No extra mods listed for this file.
Where it goes
Is Just Utilities required on the client, server, or both?
Installation on the client is optional. Installation on the dedicated server is optional.
The source marks this as usable on both the client and server.
What else does Just Utilities 21.1.2 need?
21.1.2. Change the file and its required mods may change too.
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 Just Utilities without breaking your instance.
Built for Just Utilities 21.1.2. Pick another file and the loader, install side or required mods may change.
- 01
Stick to this file
Use 21.1.2. It targets 1.21.1 with Fabric; 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
Installation on the client is optional. Installation on the dedicated server is optional.
- 04
Pick the file you checked
Use the “Get this file” button beside 21.1.2. It opens that exact file at the source.
About this project
What does Just Utilities add?
Tldr; This mod is a personal Modding API/Library.
The long story:
This Library mod, started as a collection of personal helpers, common code and lots of other stuff.
But it grew with my switch to "non API modding", where I am not using Forges,
Fabrics, Quilts or NeoForges API, but solely rely on Vanilla APIs and code.
And it's now a gateway to easily making mods that work on 4 mod loaders at once,
without having to write a single line of code more than once.
Warning/Disclaimer
There are only 2 safe and legit places to get this mod, Modrinth and Curseforge. If you are seeing this on any other site, be aware that this was copied with permissions, and the site may hide malware in mod files.
For Developers
It is still heavily W.i.P. and is still a personal API published under the ARR license.
(A more permissive license is planned, but it won't be open source)
You are free to use this library for your own mods, as long as you do not shade, or jar in jar it.
But do not expect stability or support, as it's still in early development,
it's prone to changes and it'll grow as I need it.
Project description from Modrinth.
Pick your setup
Just Utilities by Minecraft version and loader
Choose the version and loader you play, then open the matching release.
1.21
2 loader builds1.20.1
1 loader buildCheck the dependencies, then try the file in a copied instance before changing a world you care about.
Recent files
Just Utilities versions and loaders
21.1.2
justutilities-fabric-1.21.1-21.1.2.jar
23 Aug 2026
21.1.2
justutilities-neoforge-1.21.1-21.1.2.jar
23 Aug 2026
21.1.1
justutilities-fabric-1.21.1-21.1.1.jar
23 Aug 2026
21.1.1
justutilities-neoforge-1.21.1-21.1.1.jar
22 Aug 2026
21.1.0
justutilities-neoforge-1.21.1-21.1.0.jar
21 Aug 2026
21.1.0
justutilities-fabric-1.21.1-21.1.0-dev.jar
21 Aug 2026
21.0.9
justutilities-fabric-1.21-21.0.9.jar
8 Dec 2024
21.0.9
justutilities-neoforge-1.21-21.0.9.jar
8 Dec 2024
21.0.8
justutilities-fabric-1.21-21.0.8.jar
7 Nov 2024
21.0.8
justutilities-neoforge-1.21-21.0.8.jar
7 Nov 2024
21.0.7
justutilities-neoforge-1.21-21.0.7.jar
2 Nov 2024
21.0.7
justutilities-fabric-1.21-21.0.7.jar
2 Nov 2024
Looking for an older file? The official Modrinth project page is in Resources.