FerriteCore
Java mod listed for Minecraft 26.x. File opened and checked on 21 Sep 2026; downloads from the MC Java Mods app on Android.
I don't know my version or loader
This mod reduces the memory usage of Minecraft in a few different ways. A high-level technical description of the changes is available here.
The amount of memory saved will depend on the pack. In version 2.5.9 of All Of Fabric 3 it reduces the RAM usage (heap size) from 1,792 MB to 984 MB. For comparison the same setup with Hydrogen instead of FerriteCore uses 1,335 MB.
These values were measured after generating a world with a fixed seed and waiting for two minutes.
The project picture is a cropped version of this picture.
FAQ
Should I install this on the server or just on the client?
Some optimizations are client-side only, but there are some rather high-impact optimizations that are relevant on the server too. So you should install it on both sides.
Is this compatible with [other mod]?
Most likely yes. The only exception is Hydrogen, which is compatible with all recent FerriteCore versions on Minecraft versions where Hydrogen is officially released. This means that 1.18+ builds are not compatible with Hydrogen, since it has been officially archived and won't receive any releases on these versions.
- Edition: Minecraft Java
- File type: .jar
- Minecraft versions listed: 26.1, 26.1.1, 26.1.2
- How to install: Install the matching mod loader (Forge, Fabric or NeoForge) for your Minecraft version. → Download the .jar. → Put it in the .minecraft/mods folder and launch that loader profile.
- Where to get it: Opens on Modrinth — not every file is mirrored on our own servers.
Install steps are the general flow for this file type — How to install Minecraft Java mods & modpacks walks through it step by step.
- Ships as ferritecore-9.0.0-fabric.jar — drop this file into the mods folder
- Download size: 71 KB
- Download link checked 23 Oct 2026 — working
These come from our own check of the pack file, not from the source page.
