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Modrinth · Minecraft modpack

ZeroLag

A lightweight, ultra-optimized Fabric modpack focusing on maximum FPS performance, engine stabilization, and seamless vanilla+ quality-of-life enhancements.

Choose a version Pick your version below, then grab the matching file.

Quick answer

Which ZeroLag release should I use?

Updated 4 months ago
Latest stable file ZeroLag 1.0.0+1.21.11
Game version 1.21.11
Loader Fabric 0.19.3

ZeroLag 1.0.0+1.21.11 is a complete pack release for 1.21.11 with Fabric 0.19.3. Install it as its own launcher instance. If the creator publishes a separate server file, make sure it names this exact pack release. 44 mods in this pack file.

Pack setup

How should I set up ZeroLag for players and a server?

Use ZeroLag 1.0.0+1.21.11 as the pack version. Install the pack as its own launcher instance. The creator’s listing does not name a separate server file, so check the release notes before setting up a dedicated server. Do not upload the ordinary client folder blindly.

Client instance Install ZeroLag 1.0.0+1.21.11
Dedicated server setup Match ZeroLag 1.0.0+1.21.11
Pack loader Fabric 0.19.3

A pack is a matched client and server setup, not one mod with an install-side label. Keep its release, loader, manifest and overrides together.

Referenced mods 44
Client only 24
Server only 3
Not labelled 17

These numbers come from the pack file you chose. “Not labelled” means we don’t know which side it belongs on—not that it is safe everywhere. The file count is not a RAM estimate.

What are the server requirements for ZeroLag?

ZeroLag 1.0.0+1.21.11. Change the pack release and its contents or setup may change too.

44 mods in this pack file

The selected pack release is ZeroLag 1.0.0+1.21.11. That file is for Minecraft 1.21.11 with Fabric 0.19.3. It contains 44 mod projects. The creator’s listing does not name a separate server file. Check their notes before using one, and do not upload an ordinary client folder or rebuild the pack mod by mod. A file count cannot tell us the right RAM, CPU or storage; size the server for the players and world you actually run.

About this project

What kind of pack is ZeroLag?

ZeroLag


ZeroLag is a cutting-edge optimization pack built for Fabric that extracts every drop of performance out of your game while maintaining a clean, highly functional Vanilla+ feel. Whether you are running on a high-end rig or a low-spec laptop, this pack stabilizes your frame rates, fixes underlying engine bugs, and modernizes your gameplay experience.


🚀 Key Features

💻 Ultimate Performance & Engine Fixes

We feature industry-standard optimization mods alongside advanced engine improvements to ensure smooth, responsive, and stutter-free gameplay:

  • Rendering & Logic: Powered by modern rendering optimizations to dramatically improve frame rates and frame consistency.
  • Memory & Optimization: Includes advanced memory management and performance enhancements to reduce overhead and improve stability.
  • Culling Tweaks: Intelligent culling systems prevent unnecessary rendering of hidden entities, blocks, and other visual elements.
  • Engine Enhancements: Multi-threaded world loading, optimized game logic, and faster world generation help Minecraft run more efficiently.
  • Bug Fixes: Comprehensive vanilla bug fixes and gameplay improvements provide a more polished experience.

🛠️ Vanilla+ Quality of Life & UI Updates

Performance means nothing if the game isn't comfortable to play. ZeroLag includes carefully selected quality-of-life improvements while remaining lightweight and unobtrusive:

  • Quality of Life: Helpful gameplay utilities, inventory improvements, recipe viewing, and interface enhancements designed to make everyday gameplay smoother.
  • Clean Interface: A refined UI experience with optional dark-themed elements and improved menu presentation.
  • Custom Menus: Includes multiple custom panorama backgrounds to give the pack a unique identity while keeping the vanilla aesthetic intact.
  • Cactus Mod Client: Access utility features by pressing Right Shift (RShift); to learn more about its capabilities, visit their official page here.
  • Privacy & Safety: Includes features that help preserve the traditional multiplayer chat experience while maintaining compatibility with modern servers.

📦 Manual Recommendation Note

To comply with platform restrictions, a few highly recommended client-side optimizations are hosted under restrictive licenses. For the absolute best stability against VRAM issues, we highly recommend manually downloading:


⚙️ Configuration & Keybinds

ZeroLag ships pre-configured with streamlined settings designed for optimal performance right out of the box. Most options can be customized through Mod Menu, powered behind the scenes by YetAnotherConfigLib and Cloth Config API.

Whether you're playing on integrated graphics, a gaming laptop, or a high-end desktop, ZeroLag is designed to deliver a fast, stable, and hassle-free Minecraft experience.


🚀 ZeroLag Philosophy

Less clutter. More FPS.

Project description from Modrinth.

Mods in ZeroLag 1.0.0+1.21.11

Open any mod on Modpacks.ch to check its files and dependencies.

alternate-current-mc1.21.11-1.9.0.jar SHA-1 f35f95c653c0ec99fa2aa5f993306922d00e59e9 · Modrinth version XdouG8YV · Project link unavailable Server only
architectury-19.0.1-fabric.jar SHA-1 2d40563f7e36f7a03f094031aeaacb175117928e · Modrinth version uNdfrcQ8 · Project link unavailable Side not labelled
BadOptimizations-2.4.1-1.21.11.jar SHA-1 70fa28d5a7a1fdd61dd804ca6ac411750da1473f · Modrinth version Q3Dusz2j · Project link unavailable Client only
BetterAdvancements-Fabric-1.21.11-0.4.8.54.jar SHA-1 b816a30ec627c4a45a6ee4cf62d8b1c31e42d7e5 · Modrinth version 8im6QWDT · Project link unavailable Client only
betterhiddenchat-1.2.0.jar SHA-1 083c17fb3ae6f469c28ceafb56a59fdefa793f40 · Modrinth version 4UXdHglM · Project link unavailable Client only
c2me-fabric-mc1.21.11-0.4.0-alpha.0.19.jar SHA-1 9e87a1d9066f8b4c6eee20e6556834e20c7cc1e8 · Modrinth version OOPL1nCG · Project link unavailable Side not labelled
cactus-0.12.3.jar SHA-1 ac31e4181de5070f87d650babb940ec6f8b4be23 · Modrinth version T1z5RECT · Project link unavailable Client only
Chunky-Fabric-1.4.55.jar SHA-1 19c34a23a5c1b2f6c73117b8eb4524b521e1926b · Modrinth version 1CpEkmcD · Project link unavailable Side not labelled
cloth-config-21.11.153-fabric.jar SHA-1 4c224606a963bce223db5b27edb4959ecf40d4ee · Modrinth version xuX40TN5 · Project link unavailable Side not labelled
Clumps-fabric-1.21.11-29.0.0.1.jar SHA-1 626fde9e970030cfc8cb64cd0a1abfc03d37ecc2 · Modrinth version OgBE8Rz4 · Project link unavailable Side not labelled
Controlling-fabric-1.21.11-29.0.1.jar SHA-1 afbbbb9248d9afe6224886c62ee1b35732f056f3 · Modrinth version A6W4m3vi · Project link unavailable Client only
debugify-1.21.11+1.1.jar SHA-1 a8852a320c6d1a448cfc0f7cb0369e0a3c858146 · Modrinth version xVevtAGn · Project link unavailable Side not labelled
dynamic-fps-3.11.6+minecraft-1.21.11-fabric.jar SHA-1 2e5ab45e69b43812491cfa34f8f7a4ce7623c233 · Modrinth version Fab7e5Th · Project link unavailable Client only
elytratrails-1.4.8.7-1.21.11.jar SHA-1 0ee803560cf71effdd0696ebc7461b8a4360f2f5 · Modrinth version WoviAL6C · Project link unavailable Client only
entityculling-fabric-1.10.5-mc1.21.11.jar SHA-1 270493a6d3a3214495abed9e74f2181817043963 · Modrinth version sP0vNbeN · Project link unavailable Client only
exordium-fabric-2.1.1-mc1.21.11.jar SHA-1 5aab4395e5d501ee9b578162fcf643352685fc4c · Modrinth version pZAsvm42 · Project link unavailable Client only
fabric-api-0.141.4+1.21.11.jar SHA-1 13d3885dfec40313e2b3bf9ee639353272b9b48a · Modrinth version 5zJNhXV2 · Project link unavailable Side not labelled
fabric-language-kotlin-1.13.12+kotlin.2.4.0.jar SHA-1 2bc17bb4275cc70a12e4ac35d139a71a30845720 · Modrinth version Pd0xrHCw · Project link unavailable Side not labelled
fast-ip-ping-v1.0.11-mc1.21.11-fabric.jar SHA-1 f40159e00187cdd12653f460dc9cd1bdf18d0ba5 · Modrinth version E3Ei5xUe · Project link unavailable Client only
fastquit-3.1.3+mc1.21.11.jar SHA-1 9ba127357e1fc9ff800496250fb510f70f394714 · Modrinth version ip2tVKLp · Project link unavailable Client only
ferritecore-8.2.0-fabric.jar SHA-1 c2e2f5e008f5bc9f401dfad8ca94909917006b65 · Modrinth version Ii0gP3D8 · Project link unavailable Side not labelled
ImmediatelyFast-Fabric-1.14.3+1.21.11.jar SHA-1 43e451464f979bdf9ff4ac288b358a2f91b79ed8 · Modrinth version 4EwhsTu7 · Project link unavailable Client only
iris-fabric-1.10.7+mc1.21.11.jar SHA-1 aae8567bd9ea397d50aff1d0b680a82ffe67040c · Modrinth version fDpuVzVr · Project link unavailable Client only
krypton-0.2.10.jar SHA-1 94ddaeeae6ca7fecc79e54a0aa02a5438a775a99 · Modrinth version O9LmWYR7 · Project link unavailable Side not labelled
lithium-fabric-0.21.4+mc1.21.11.jar SHA-1 203bdcb26e97b3217b045e1182651a7d7b6462ec · Modrinth version Ow7wA0kG · Project link unavailable Side not labelled
modernfix-5.26.3-build.1.jar SHA-1 4b0758e7c052b20ebb58cde9de083520a3d114ab · Modrinth version yPCwXBn8 · Project link unavailable Side not labelled
modmenu-17.0.1-beta.1.jar SHA-1 3fdcb2b8ec85ebdab1c344f0eec19ddf37512ca1 · Modrinth version j2vTurvl · Project link unavailable Client only
moreculling-fabric-1.21.11-1.6.2.jar SHA-1 11a929de62650cc536244d4c2ba889fa84c1c0f2 · Modrinth version wOzykoLV · Project link unavailable Client only
MouseTweaks-fabric-mc1.21.11-2.30.jar SHA-1 86515de45fe960bd717deea0954055106e857b81 · Modrinth version i1duwnJl · Project link unavailable Client only
NoChatReports-FABRIC-1.21.11-v2.18.0.jar SHA-1 4e519507bdd81ce2520da33f497a5f12469f5b10 · Modrinth version rhykGstm · Project link unavailable Side not labelled
noisium-fabric-2.8.3+mc1.21.11.jar SHA-1 2851c7824664bc970367f89710ffd569f49a761c · Modrinth version VyMvRQKq · Project link unavailable Server only
obe+1.21.11-1.1.29.jar SHA-1 93f9a36a60861a9ad6856a79bb37150fc6c3c5d6 · Modrinth version nRbh9Jqp · Project link unavailable Client only
optigui-2.3.0-beta.10+1.21.9.jar SHA-1 1e209418863e8fda53508e33a3251a59b1db7220 · Modrinth version QM4pzEcr · Project link unavailable Client only
packed_packs-fabric-2.2.1+1.21.11.jar SHA-1 68e765ba891c2f1e6cc6f3116d744afae41150ac · Modrinth version 7xiguGSQ · Project link unavailable Client only
placeholder-api-2.8.2+1.21.10.jar SHA-1 bbdc920ecff993148cd6e81a208536132245ce40 · Modrinth version qxjzQ9xY · Project link unavailable Side not labelled
reeses-sodium-options-fabric-2.0.3+mc1.21.11.jar SHA-1 fb452b122fd72e8540d32fbe3df01cc34a45ce41 · Modrinth version yIgAFMna · Project link unavailable Client only
Resourcify (1.21.11-fabric)-1.8.3.jar SHA-1 4a7bd6f117997fa4857d2cdad65513aae1cac9b2 · Modrinth version ijoZDewc · Project link unavailable Client only
RoughlyEnoughItems-21.11.816-fabric.jar SHA-1 86aebb79a49a57f3a872783ebc8bb624fb26f933 · Modrinth version QEiKPzyl · Project link unavailable Side not labelled
ScalableLux-fabric-0.3.0-alpha.0.3-all.jar SHA-1 e834feeca2246156f01df257da910d47dd9a5916 · Modrinth version ju27pK32 · Project link unavailable Side not labelled
Searchables-fabric-1.21.11-1.0.4.jar SHA-1 32d0edf6f65aa9d7b33312a14cd5125aad189850 · Modrinth version 8t7XWQgt · Project link unavailable Client only
sodium-extra-fabric-0.9.1+mc1.21.11.jar SHA-1 49783b5a7f2bec3330ab4e776f91620e5646ac87 · Modrinth version zmsIDdn6 · Project link unavailable Client only
sodium-fabric-0.8.7+mc1.21.11.jar SHA-1 e8865210ba9a926fc206ab9e73f9d4988a81ff69 · Modrinth version UddlN6L4 · Project link unavailable Client only
yet_another_config_lib_v3-3.8.2+1.21.11-fabric.jar SHA-1 f99cda70903f16dd6927a276150b2762b4d5ab66 · Modrinth version pHWDw3Vc · Project link unavailable Side not labelled
zfastnoise-1.0.39+1.21.11.jar SHA-1 22209897b84ca2d1601a60f280dc50462f551422 · Modrinth version 3uLIzf05 · Project link unavailable Server only

Pick your setup

ZeroLag by Minecraft version and loader

Choose the version and loader you play, then open the matching release.

3 available setups

Made local changes? Try them in a copied instance before touching a world you care about.

Recent files

ZeroLag versions and loaders

4 of 4 releases match

Looking for an older file? The official Modrinth project page is in Resources.