ModernFix-mVUS
Modby Coredex
A fork of ModernFix that adds minor version update support.
Type
Mod
CurseForge Downloads
1,269,153
CurseForge ID
1367508
Modrinth Downloads
7,487,971
Modrinth ID
TjSm1wrD
Last Updated
Sep 11, 2026
Description

ModernFix-mVUS is a fork of ModernFix that will release Modernfix versions for any version that is not supported by the official mod.
When the official mod updates to a specific minecraft version this fork will skip releasing that version.
The donation and server host links still point to the official creator's pages.
ModernFix is an all-in-one mod that improves performance, reduces memory usage, and fixes many bugs in modern Minecraft versions (most versions including and above 1.16 are supported) without majorly compromising the game experience. Most Forge 1.16-1.19.2 modpacks will launch roughly twice as fast with ModernFix installed. If some non-default options are enabled, it can even allow large modpacks like All The Mods 8 to run with 3GB or less of allocated memory.
ModernFix is free, open-source software. All of the code is available on the GitHub repository.
- Multiple contributions made by https://github.com/DerCommander323
⚙️ Technical summary
What exactly does ModernFix do for your game? There are a lot of tweaks being made - too many to summarize here. However, here is a brief summary of the general types of improvements being made:
- Backports of bugfixes from newer versions of Minecraft and/or Forge, e.g. fixing worlds breaking when you remove a dimension mod in 1.18.
- Patches to mods that are no longer supported on a given Minecraft version, to improve the gameplay experience instead of requiring players to update.
- Many optimizations & improvements to the game's launch process to significantly improve speed and reduce random concurrency crashes.
- Additional debug tools to help modders and players determine the cause of some rare game crashes/freezes, instead of relying on a painful mod bisection process.
- It's not enabled by default due to compatibility issues, but ModernFix includes functionality to completely redesign the game's model loading system, replacing it with a new, dynamic version that loads models on the fly. Model loading is one of the major performance regressions to modded Minecraft that has been present since 1.8, and this new system alleviates nearly all of the downsides, bringing memory usage and loading times more in line with how they were in 1.7.10.
- Need to play the vanilla game with very little RAM allocated (e.g. 512MB or less)? Now you can do that. Head to the "Ultra-Low Memory Footprint" page on the wiki.
If you are technically savvy and looking for more details on each patch, I recommend reading the Summary of Patches wiki page.
🐛 Where to go when something doesn't work
Please report an issue on GitHub. Be sure to mention the Minecraft version, modloader, and ModernFix version you are using, as well as what other mods you have installed.
🎁 How can I support this project?
There are two main ways you can help support the development of ModernFix:
- Spread the word! Test ModernFix in modpacks and encourage them to include it.
- If you feel generous, I do accept donations via Ko-fi. Donating is not required (as ModernFix is free), but every little bit helps. I work on ModernFix in my spare time, so any compensation I receive helps to sustain development.
❓ What other mods should I use?
There are many performance mods available for Minecraft and I can't list them all here, but here are some essential mods, in my opinion:
- On any version before 1.19.4 you should always have LazyDFU installed, as it eliminates the incredible lag caused by the DFU system.
- On any version before 1.20 you should generally use Starlight unless it has a compatibility issue with your mods (which is quite rare). It offers vastly improved lighting performance and can also fix FPS stutters when moving between chunks.
- Always have FerriteCore installed, as Mojang's implementation of blockstates/models is laughably inefficient, and quickly consumes RAM as soon as more content is added beyond what vanilla offers.
- Install a mod like Shutup Experimental settings (before 1.19) or Yeetus Experimentus (1.19+). These mods will suppress the pop-up screen about experimental game features, which otherwise causes the game to reload its resources twice.
On a related note: I do not recommend use of OptiFine in any modded scenario. It is closed-source, patches the game in a way that easily breaks Forge and other mods, and significantly slows down game launching, often on the order of minutes. Please consider using Sodium (on Fabric) or Embeddium (on Forge) instead. Using OptiFine with ModernFix is not officially supported, and may cause issues.
Need a Minecraft server? Consider CreeperHost!

Recommended Gear
AffiliateHardware and extras that pair well with this mod.
As an Amazon Associate I earn from qualifying purchases.
Similar Mods
Starter Kit
📦 Give all new players joining the world configurable starter gear, items and/or potion effects. It can overwrite the i...
ValkyrieLib
Library for all of ValkyrieofNight's Mods
Redstone Flux
Redstone Flux API - Energy Transfer in Minecraft.
Better Fps - Render Distance[Forge]
Better FPS Render Distance is a mod which adds a few performance improvements to increase fps.
RFTools Power
RFTools addon for all power generator/storage
Inventory HUD+
Adds your main inventory, potion effects and your equipments to your HUD. And few other features.
Included in Modpacks (539)
Show fewer
Optimized Vanilla Extra (OVE)
Stars Optimized
Lively Craft
Sherbert
Roimy Zomsa’s Lightweight Mods
MiraOptimizer✨VULKAN
uh optimization
Axo's Optimizations
vibrant experience
Optimization Q
KingPvP
Connect Client
OptimizedPVP+
The True Vanilla
Nefix Optimized
MrOptituber
MacCraft
FurCraft
WynnCat
Awesomely Optimized
Just Optimised
Faithfully optimized
Perfect Java
Pix Vulka Optimizations
Redmium
Endo Vanilla
Vulkan Vitalised
Trailer Vibes Client
Zomb's PvP Optimization
One Click Optimization.
UNIPACK
Optimized Utilities
ClearTick
foxward-lite
BULA SMP
Sodtesium
Jotunheimr
Smart & whimscape
Survival singleplayer/multiplayer
Miras's modpack for phones
SEAF MC Modpack
Corroxin's optimizations
Candyy
Builtechraft Client Mods
SkyBloke
Remboy perfect
EndlessPixel-Modpack
VortexCraft
EdonMe Survival
Renice Cubed
Telium
CatModOpti
Minecraft: Promo Edition
Perfect Better Vanilla
Sestain's Optimizations
The Frame Machine
Remboy optimized
Game Speed Optimized
Pvp Optimized Pack
Skyblock essentials (SE)
BetterVanilla SMP ModPack
Jack Pack
Tekwiz
Jannes Modpack
Quant
BlueAxolotl
LessGrind+
OneClient
Modded Bridge
DDR6 (Best Performance Modpack)
Mutzman's Modpack
visually perfected
Eclipse Client
KillFPS+
THE OPTIMIZER
WokPack Voxy
Creative FPS+
Simply Optimized ReForked
NasheyPvP
Nightfall SMP Modpack
ClientRefine
OptiCore
Beyond Optimized
Skyblock Ascended
Simply Optimized Rebirth
VulkanizedPVP
HeavyCraft+
SeasonCraft Client-Side Modpack
Glatzencraft
Note Block SMP