Menu

modpack

OptiFabMinecraft modpack for 1.21.11

Implement Optifine function on Fabric

client onlynewest supported release 1.21.11OptimizationLightweight
Latest version
1.5.0
Minecraft
1.19.3 to 1.21.11
Java
Java 21+
Loader
Fabric
Licence
MIT
Downloads
16.6k
Updated
9 mo ago
Available on
Modrinth

Screenshots

Click a screenshot to open it. Screenshots are served from the author’s own host and belong to them.

Minecraft versions

Every version OptiFab declares support for, newest first, with the Java runtime that version needs.

Other modpacks
MinecraftThroughJavaEvidenceReleased
1.21.11Fabric21+declared9 Dec 2025
1.20.4Fabric17+declared7 Dec 2023
1.20.2Fabric17+declared20 Sept 2023
1.20.1Fabric17+declared12 Jun 2023
1.20Fabric17+declared2 Jun 2023
1.19.4Fabric17+declared14 Mar 2023
1.19.3Fabric17+declared7 Dec 2022

Download

From OptiFab’s own host. Nothing is re-hosted here.

Most recently published release

1.5.0release25 Jan 2026

OptiFab.mrpack · 39 KB · for 1.21.11 · Fabric

Download this release
1c8dfb55b2dd…
Older versions21
  • 1.4.021 Mar 20241.20.40.4 MB2.4k downloadsbac8ffaf784a…Get
  • 1.3.313 Oct 20231.20.225 KB2.8k downloadsa2b0a3af0ad3…Get
  • 1.3.230 Sept 20231.20.224 KB417 downloadsecf4fc1e97c7…Get
  • 1.3.124 Sept 20231.20.213 KB252 downloads2d4bbfc09c70…Get
  • 1.324 Sept 20231.20.179 KB4.2k downloadsd0df8f0d6c60…Get
  • 1.2.915 Aug 20231.20.178 KB848 downloads79baac132300…Get
  • 1.2.830 Jul 20231.20.178 KB400 downloadsfe54a02e9e7a…Get
  • 1.2.729 Jun 20231.20.177 KB594 downloads1081ce5ea63f…Get
  • 1.2.629 Jun 20231.2077 KB736 downloads3da767040f2e…Get
  • 1.2.522 Jun 20231.20.176 KB319 downloads9d770c50a997…Get
  • 1.2.422 Jun 20231.2076 KB279 downloads251b98ca6df8…Get
  • 1.2.220 Jun 20231.2076 KB186 downloadsd70e4e3c50ca…Get
  • 1.2.320 Jun 20231.20.176 KB163 downloads70cc0b11b11c…Get
  • 1.2.118 Jun 20231.20.175 KB232 downloadsf7425b40a4b2…Get
  • 1.2.013 Jun 20231.2075 KB489 downloadsef9f5e2b3de5…Get
  • 1.1.420 Apr 20231.19.429 KB759 downloads2b6e2b569bcc…Get
  • 1.1.330 Mar 20231.19.40.6 MB219 downloads2bd3a6caa884…Get
  • 1.1.225 Mar 20231.19.41.1 MB190 downloadscd048b16d65f…Get
  • 1.1.124 Mar 20231.19.426 KB192 downloads8fe026c798cd…Get
  • 1.122 Mar 20231.19.30.6 MB411 downloads6240b18b093e…Get
  • 1.03 Mar 20231.19.30.4 MB287 downloads7ebbe6866eac…Get

Frequently asked

Does OptiFab work on Minecraft 1.21.11?

Yes. 1.21.11 is the newest Minecraft version OptiFab declares support for, and the claim comes from the author's own release metadata rather than from a compatibility list somebody maintains by hand.

Which Minecraft versions does OptiFab support?

Everything the author has declared, from 1.19.3 up to 1.21.11. The full list is in the table above, with the Java runtime each version needs next to it.

Do I need to install OptiFab on the client or the server?

The client only. There is nothing to install on the server side. That is the author's declared design, not a guarantee for every server: one running anti-cheat or missing a counterpart mod can still object.

Which platform or loader does OptiFab support?

Fabric. A build for one platform or loader will not necessarily load on another, so this is the first thing to check before the Minecraft version.

Which Java version do I need for OptiFab?

Among the supported Minecraft releases above, the highest recorded requirement is Java 21 or newer. Use the requirement for the exact Minecraft version you run; previews and snapshots may differ.

What licence is OptiFab under?

MIT, as stated by the author on the platform we synced it from. Check the project's own page before redistributing or bundling it.

How do I install OptiFab?

Use a launcher that imports packs, such as Prism Launcher, the Modrinth App or the CurseForge app, and open the pack file with it. The launcher installs the right loader and mods for you; installing a pack's mods by hand is the error-prone way.

Where do I download OptiFab safely?

Start with the author's page on Modrinth, which is where the data here is synced from. MCReference does not host or repackage files. When available, recorded download links go to the source for that release; verify the publisher, filename and any available checksum before running it.

Works on the same versions

Ordered by how much of the recent Minecraft version coverage overlaps, not by popularity.

MAX FPS: Optimized🚀 MAX FPS WITHOUT UNNECESSARY MODS! Only 16 optimization mods - NOTHING EXTRA! ✅ ALL MAJOR VERSIONS ⚡ INSTALLS ON ANY LAUNCHER! (Guide below)Simply Optimized ReloadedAn unofficial port of Simply Optimized built to support every major mod loader and stay current with the newest versions of Minecraft.FPS+ PvP Boost | Ultimate FPS & Combat Client [ Every Version ]Ultra-lightweight FPS boost & PvP modpack for Fabric. Boost FPS on low-end PCs with Sodium optimizations, lower input lag, cleaner visuals, and combat HUD tweaks built for Hypixel Bedwars, Duels, PotPvP & CPVP. Maximize frames and dominate fights.Optimized CoreThis is a modpack core that optimizes the game. Mainly meant as a base for your own modpack/instance. It only contains optimization mods and for this reason it achives the BEST performance of any modpack!Awesomely OptimizedSame look, same game, double the frames!Just OptimizedSpeeds up the game performance by a lot for both client and server

Details from Modrinth, where the author last updated it on 25 Jan 2026. We do not host files or republish descriptions. Available download links point to the author’s own release.

Is this information wrong or missing something? .