FerriteCore ((Neo)Forge)
Java mod listed for Minecraft 1.16–1.21. File opened and checked on 21 Sep 2026; downloads from the MC Java Mods app on Android.
⬇ Download on CurseForgeThis page is for the Forge version. If you are looking for the Fabric version you can find it here.
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 1.2.0 of the 1.16.4 Direwolf20 pack it reduces the memory usage (after GC) on the title screen roughly from 3.1 GB to 1.1-1.2 GB.
The project picture is a cropped version of this picture.
FAQ
Can you backport this to [MC version before 1.16]?
No, I won't backport it. I do not consider it worth the effort, and would like to encourage people to use more recent versions.
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.
This is the Forge page, why are there Fabric builds here?
I released those builds before I created the Fabric page, you should ignore them (unless you're specifically looking for older builds of FerriteCore on Fabric).
- Edition: Minecraft Java
- File type: .jar
- Minecraft versions listed: 1.21.11, 1.21.9, 1.21.10
- 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 CurseForge — 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.
FerriteCore ((Neo)Forge) is a free Minecraft Java mod. Compatible with Minecraft 1.21.11, 1.21.9, 1.21.10, 1.21.5 and newer. Downloaded 225,056,151 times (via CurseForge). Download it and open it directly in the game.
