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Lithium (Fabric/NeoForge) logo

Lithium (Fabric/NeoForge)

Mod

by JellySquid

An optimization mod for Minecraft which improves server performance significantly.

Type

Mod

CurseForge Downloads

102,108,492

CurseForge ID

360438

Modrinth Downloads

141,582,530

Modrinth ID

gvQqBUqZ

Last Updated

Nov 7, 2026

Description

Lithium is a modern, general-purpose optimization mod for Minecraft which works to improve a number of systems (game physics, mob AI, block ticking, etc) with the goal of not changing any vanilla mechanics.


The mod works on both the client and server, and can be installed on servers without requiring clients to also have the mod (and vice versa.)


For multiplayer servers, administrators can expect a sizeable improvement to tick times, allowing their hardware to support more loaded entities, chunks, and players. Even in single-player, Lithium helps to improve performance by optimizing the internal game server, which is used for "ticking" the world. This can free up your computer's processor to focus on other tasks, resulting in improved frame rates and increased responsiveness.


The strict goal of maintaining exact behavior with vanilla makes Lithium suitable for almost any Minecraft server running Fabric, even for highly complex gameplay scenarios and creations. In fact, our continued insistence towards not changing vanilla gameplay has even led to the mod being officially allowed in Minecraft speedrunning.


Installation

Make sure you have the latest version of Fabric Loader present and then simply drop the mod into your mods folder. No other mods or additional setup (not even Fabric API!) is required. You do not need to create new worlds in order to take advantage of the mod.


While you're at it, you may want to check out Sodium, which improves rendering performance.


Configuration

Lithium makes use of an semi-unusual configuration system which allows you to enable or completely disable patches the mod applies. This system allows fine-grained control over what code in Minecraft is modified by Lithium, and as such, can be used to completely eliminate bugs or mod incompatibilities introduced by the mod.


For more information, please read the wiki entry on modifying your configuration file.


Please note: An empty configuration file is perfectly normal and just means you want to use the default options, which are already set up out of the box for the best performance the mod can offer.


Reporting Issues

Please use the issue tracker linked at the top of the page to report bugs, crashes, and other issues.

Compatibility

Mod Loaders

Fabric Neoforge Quilt

Game Versions

1.16.2 1.16.3 1.16.4 1.16.5 1.17 1.17.1 1.18 1.18.1 1.18.2 1.19 +28 more

Recommended Gear

Affiliate

Hardware and extras that pair well with this mod.

Mini PC for self-hosting

Mini PC for Self-Hosting

A low-power box that can sit in a cupboard and run a modded server around the clock.

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Included in Modpacks (3,812)

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JUSTCREATE_byzemzemsuyu JUSTCREATE_byzemzemsuyu TinyN TinyN Hellstrike: Advanced Warfare BLOCK ALM BLOCK ALM Project Beautiful Project Beautiful Purgreate Purgreate Frost And Fungus Frost And Fungus Virimon Virimon XenCraft Ultimate Hypixel Dungeons Ultimate Hypixel Dungeons [First Night] [First Night] Rutles port Rutles port Official Yakuza modpack Official Yakuza modpack SilentTech SilentTech Kwynn Kwynn Loser Modpack Loser Modpack Fireworks Optimization Fireworks Optimization Tryforce optimizations Tryforce optimizations Better Create Better Create Seed & Stock: Swords to Plowshares Seed & Stock: Swords to Plowshares Croissant Pack Croissant Pack Tales of the Horizon Tales of the Horizon Opinionatedly Optimized Opinionatedly Optimized wiktrEx Youtube Pack wiktrEx Youtube Pack Perfected Aeronautics Perfected Aeronautics Titanroot Skies Titanroot Skies Palarenew-modpack Palarenew-modpack OpTimatic LITE Inazuma Cobblemon Inazuma Cobblemon Liye Liye Lush Lands Lush Lands Traveller's Heaven Traveller's Heaven Mobs & Mines V2 Mobs & Mines V2 NEOptimized NEOptimized Mundo Mods Reforged Mundo Mods Reforged WhiteWorld Modpack WhiteWorld Modpack Oddymized Oddymized MazOptimized MazOptimized Cobblemon Cobalt Edition Cobblemon Cobalt Edition aLFa_iq aLFa_iq SirLaughalotMC Plays Create Modpack SirLaughalotMC Plays Create Modpack MC Sooty Edition MC Sooty Edition Platano Vanilla Blend Platano Vanilla Blend LumaVale LumaVale MeepPack MeepPack Verdant Depths: Fabric Reforged Verdant Depths: Fabric Reforged CaptnJason's Server Pack CaptnJason's Server Pack OriDET Pack pasta's create modpack pasta's create modpack PrimeFormance Engine PrimeFormance Engine Stratos Сore Stratos Сore Extremely optimized Extremely optimized Fairly Optimized Fairly Optimized MC Royale MC Royale xXCAMPXx xXCAMPXx FrameCraft FrameCraft RP Skin Figura Pack RP Skin Figura Pack create simple cool create simple cool BTE Canada Modpack BTE Canada Modpack Okibee TFC Okibee TFC Teushitties Revenge 3D: Dorfeldt Fucking Dies Teushitties Revenge 3D: Dorfeldt Fucking Dies Definitive Vanilla Definitive Vanilla MTC (Mastering the Crafts) MTC (Mastering the Crafts) Vanilla Refreshed Vanilla Refreshed ZoeyNeko's Create Modpack ZoeyNeko's Create Modpack Felix′s Survival Modpack Creatine Creatine ZSM CreateSMP ZSM CreateSMP andrzejczakpack andrzejczakpack Hardcore Forever World Hardcore Forever World Well It's Optimized Well It's Optimized Client Compressed Client Compressed MbB MbB Builders Dream Builders Dream Veloz Veloz Aeronautic Adventures jonshu's structure mods! jonshu's structure mods! Aizen Private Modpack Aizen Private Modpack Something of the Sort Something of the Sort Create Zerene Create Zerene Sensible Perfected Sensible Perfected The Broken Script Chronicles The Broken Script Chronicles PulseNode PulseNode Matcha Tinted Matcha Tinted JoghurtYoki's Community S2 JoghurtYoki's Community S2 Kinda Vanilla !! Kinda Vanilla !! MinefurIV FPS+ MinefurIV FPS+ [PRH] Project Rabbit Hutch [PRH] Project Rabbit Hutch Domo's Cozy Adventure Domo's Cozy Adventure Luconia Network Modpack Luconia Network Modpack WynnEnd WynnEnd Comfy Optimized Comfy Optimized Performance Enhanced Performance Enhanced Hero Enhanced Vanilla Hero Enhanced Vanilla Bungis Pack Bungis Pack (PSG) Project survival gila (PSG) Project survival gila AtlantMC AtlantMC EwCreate Modpack EwCreate Modpack ChickenPack ChickenPack Convenient Chipping Modpack Convenient Chipping Modpack

External Resources

CurseForge Modrinth Source Code Issues