ModsJava
Marlow Crystal Optimizer
I don't know my version or loader
Open the Minecraft launcher and look at the profile you play on — it names both, like fabric-loader-1.21.4. The version also shows in the bottom-right corner of the game's main menu.
No loader in the profile name? Then it's plain Minecraft, and these mods won't run — you need Fabric or NeoForge installed first.
Marlow's Crystal Optimizer
Showcase Video
Overview
Marlow's Crystal Optimizer is a mod that optimizes the handling of using end crystals by removing the crystal client side, instead of waiting for the server to remove it. This can especially be useful when you are on higher ping.
Table of Contents
Supported Platforms & Versions
| Platform | Supported Versions |
|---|---|
| Fabric | 1.19 - 26.1.2 |
License
This project is licensed under the MIT License.
Quick facts
- Edition: Minecraft Java
- File type: .jar
- Minecraft versions listed: 1.21.11, 1.21.8, 1.21.5
- 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.
Verified by MCModsHub
- Ships as Marlow Crystal Optimizer.jar — drop this file into the mods folder
- Download size: 111 KB
- Download link checked 23 Aug 2026 — working
These come from our own check of the pack file, not from the source page.