
Just Utilities
A personal use Mutliloader Modding API
About this Mod
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.
Available Versions
How to Install Just Utilities 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 (1.21.1).
Install Mod
Open the mod browser in the dashboard and search for "Just Utilities". Click "Install" – done! Alternatively, upload the .jar via SFTP to the /mods folder.
Compatibility
Mod Loaders
Minecraft Versions
1.21.1, 1.21, 1.20.1
Server-side
✓ RequiredRecommended RAM
4 GB(min. 3 GB)Frequently Asked Questions
Just Utilities 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 (1.21.1). You can switch loaders with one click in the panel.
Is Just Utilities compatible with fabric and forge and neoforge?
Just Utilities officially supports fabric, forge, neoforge for Minecraft 1.21.1, 1.21, 1.20.1. 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 Just Utilities – how to optimize performance?
Recommended RAM: 4 GB (per 8 players). Use /spark profiler to check if Just Utilities 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.
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Rent Modded Server
Install Just Utilities with just one click on your server.