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modpack

OptiCraftMinecraft modpack for 1.21.5

OptiCraft is a comprehensive modpack designed to enhance every aspect of your Minecraft journey. Whether you're a casual player or a dedicated gamer, OptiCraft provides a wide range of improvements and quality of life changes to ensure a good experience!

client and servernewest supported 1.21.5AdventureOptimizationLightweightMultiplayer
Latest version
1.4.3
Minecraft
1.21 to 1.21.5
Java
Java 21+
Loader
Fabric
Licence
LicenseRef-All-Rights-Reserved
Downloads
3.6k
Updated
7 mo ago
Available on
Modrinth
Space NodePartner

Host OptiCraft servers

One click and OptiCraft is installed with the right loader, on hardware built for it.

  • 1.21.5
  • Fabric
  • One click modpack install
  • Dependencies handled
  • Tuned startup flags
  • NVMe SSD
Deploy a serverFrom €0.90 per GB

Minecraft versions

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

Other modpacks
MinecraftThroughJavaEvidenceReleased
1.21.5Fabric21+declared25 Mar 2025
1.21.4Fabric21+declared3 Dec 2024
1.21.3Fabric21+declared23 Oct 2024
1.21.2Fabric21+declared22 Oct 2024
1.21.1Fabric21+declared8 Aug 2024
1.21Fabric21+declared13 Jun 2024

Download

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

All 29 releases
1.4.3release23 Dec 2025

Opticraft 1.4.3.mrpack · 0.0 MB · for 1.21.1

Download latest
2e19c65d81ba…
Older versions24
  • 1.4.215 May 20251.21.10.0 MB97 downloads6c6f3379dce9…Get
  • 1.5.0-beta.22 May 20251.21.50.0 MB226 downloads29e7f8ffd1d6…Get
  • 1.2.622 Apr 20251.21.20.0 MB112 downloads7fdac17cef4c…Get
  • 1.4.122 Apr 20251.21.30.0 MB47 downloads4a870aab588d…Get
  • 1.3.121 Apr 20251.210.0 MB52 downloadsa0fe96892785…Get
  • 1.2.52 Apr 20251.21.20.0 MB60 downloads3f4eb10e68f5…Get
  • 1.4.02 Apr 20251.21.30.0 MB70 downloads9a5a4c3626f2…Get
  • 1.5.0-beta.12 Apr 20251.21.50.0 MB91 downloadsf320f173fcad…Get
  • 1.3.031 Mar 20251.210.0 MB101 downloads47a9f95d780e…Get
  • 1.3.228 Dec 20241.21.10.0 MB63 downloads89548323637e…Get
  • 1.4.0-beta.45 Dec 20241.21.30.0 MB84 downloads200cc02ca202…Get
  • 1.4.0-beta.322 Nov 20241.21.30.0 MB68 downloads5bb48ae043f6…Get
  • 1.4.0.beta-215 Nov 20241.21.30.0 MB49 downloads3e94654e15c6…Get
  • 1.2.410 Nov 20241.210.0 MB91 downloads7b3c2b4373c6…Get
  • 1.4.0.beta.18 Nov 20241.21.30.0 MB54 downloadsf1d746ad6569…Get
  • 1.2.313 Oct 20241.210.0 MB346 downloadsd92603723244…Get
  • 1.2.2-beta.320 Sept 20241.21.10.0 MB105 downloads1910f4b3091e…Get
  • 1.2.215 Sept 20241.210.0 MB192 downloadsfa051623e95f…Get
  • 1.2.2-beta.212 Sept 20241.21.10.0 MB54 downloads1c3f87f1229f…Get
  • 1.2.2-beta.13 Sept 20241.21.10.0 MB64 downloadsa5e6d28d0dad…Get
  • 1.2.130 Aug 20241.210.0 MB157 downloadsef509285677e…Get
  • 1.2.026 Aug 20241.210.0 MB88 downloadsae49b72a3519…Get
  • 1.1.418 Jul 20241.210.0 MB81 downloads79aa7d5d76e3…Get
  • 1.1.313 Jul 20241.210.0 MB134 downloadsaee0d36ec29e…Get

Frequently asked

Does OptiCraft work on Minecraft 1.21.5?

Yes. 1.21.5 is the newest Minecraft version OptiCraft 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 OptiCraft support?

Everything the author has declared, from 1.21 up to 1.21.5. The full list is in the table above, with the Java runtime each version needs next to it.

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

Both. Every player needs it installed and so does the server, so anyone joining without it will be refused.

Which loader does OptiCraft need?

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

Which Java version do I need for OptiCraft?

Java 21 or newer, because that is what the newest Minecraft release it supports requires. The requirement comes from the game rather than from the modpack itself.

What licence is OptiCraft under?

LicenseRef-All-Rights-Reserved, 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 OptiCraft?

Install the matching loader first, then put the downloaded file in your mods folder and start the game. The loader, the modpack and Minecraft all have to be on the same version, which is the usual reason a mod does not appear in game.

Where do I download OptiCraft safely?

From the author's own page on Modrinth, which is where the data here is synced from. MCReference never mirrors, re-hosts or repackages a file: every download button points at the original source, so you get exactly what the author published.

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.ElixirA well-researched performance & optimization modpack to make the game run smoother! With shader & Fresh Animations support. 26.3 Snapshot 5 ✔fps+pvpFPS + PvP Boost is a lightweight Minecraft modpack designed to maximize performance and give players a competitive edge in PvP. With FPS-boosting optimizations and combat-focused tweaks, it delivers smoother gameplay, better responsiveness, and enhanced viFastly OptimisedA modpack to enhance the performance of Pojavlauncher, MojoLauncher, Amethyst Launcher, Pojav Zenith Horizon (Zalith Launcher), Zalith Launcher2, Hello Launcher, FoldCraft Launcher, SolCraft Launcher and Low-End-PCs.Star PowerFPS Pack With Shader Support To Make Minecraft not a slideshow

Last checked 6 d ago against Modrinth. We do not host files and we do not republish descriptions; every download link points at the author’s own release.

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