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Only Optimized (FABRIC)Minecraft modpack for 1.21.10

Only Optimized is a modpack that has no extra features so is great to create as a template if you want to make something with more features. supports 1.19.4-1.21.10 (1.21.11, 1.19, 1.18, 1.17, 1.16, 1.15, and 1.14 versions coming soon!)

newest supported 1.21.10OptimizationLightweight
Latest version
MC1.19.4
Minecraft
1.19.4 to 1.21.10
Java
Java 21+
Loader
Fabric
Licence
LicenseRef-All-Rights-Reserved
Downloads
984
Updated
10 mo ago
Available on
Modrinth
Space NodePartner

Host Only Optimized (FABRIC) servers

One click and Only Optimized (FABRIC) is installed with the right loader, on hardware built for it.

  • 1.21.10
  • Fabric
  • One click modpack install
  • Dependencies handled
  • Tuned startup flags
  • NVMe SSD
Deploy a serverFrom €0.90 per GB

Screenshots

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

Minecraft versions

Every version Only Optimized (FABRIC) declares support for, newest first, with the Java runtime that version needs.

Other modpacks
MinecraftThroughJavaEvidenceReleased
1.21.10Fabric21+declared7 Oct 2025
1.21.9Fabric21+declared30 Sept 2025
1.21.8Fabric21+declared17 Jul 2025
1.21.7Fabric21+declared30 Jun 2025
1.21.6Fabric21+declared17 Jun 2025
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
1.20.6Fabric21+declared29 Apr 2024
1.20.5Fabric21+declared23 Apr 2024
1.20.4Fabric17+declared7 Dec 2023
1.20.3Fabric17+declared4 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

Download

From Only Optimized (FABRIC)’s own host. Nothing is re-hosted here.

MC1.19.4beta9 Oct 2025

OO 1.19.4 1.0.0.mrpack · 0.0 MB · for 1.19.4

Download latest
3f5473eb2f3f…
Older versions18
  • MC1.209 Oct 20251.200.0 MB28 downloads5505db9fadc5…Get
  • MC1.20.19 Oct 20251.20.10.0 MB40 downloads90bea574d9ef…Get
  • MC1.20.29 Oct 20251.20.20.0 MB23 downloads3504b7a07ae5…Get
  • MC1.20.38 Oct 20251.20.30.0 MB22 downloads1fd7061a21f8…Get
  • MC1.20.58 Oct 20251.20.50.0 MB19 downloads4556f3077862…Get
  • MC1.20.48 Oct 20251.20.40.0 MB22 downloads76b5e36d4225…Get
  • MC1.20.68 Oct 20251.20.60.0 MB23 downloads6937e60f1beb…Get
  • MC1.218 Oct 20251.210.0 MB29 downloads4d8f84c9bbe6…Get
  • MC1.21.18 Oct 20251.21.10.0 MB51 downloads357f3cddbfc6…Get
  • MC1.21.28 Oct 20251.21.20.0 MB23 downloads67241c2e2567…Get
  • MC1.21.38 Oct 20251.21.30.0 MB19 downloadsebd2664d2363…Get
  • MC1.21.48 Oct 20251.21.40.0 MB41 downloads6ab6e703c148…Get
  • MC1.21.58 Oct 20251.21.50.0 MB35 downloads8cebe4cbdec9…Get
  • MC1.21.68 Oct 20251.21.60.0 MB22 downloads769b6834062e…Get
  • MC1.21.108 Oct 20251.21.100.0 MB125 downloadsd283bd87f472…Get
  • MC1.21.78 Oct 20251.21.70.0 MB24 downloads89f1136c2107…Get
  • MC1.21.98 Oct 20251.21.90.0 MB42 downloads494fa50af56c…Get
  • MC1.21.88 Oct 20251.21.80.0 MB67 downloads861ce3785f24…Get

Frequently asked

Does Only Optimized (FABRIC) work on Minecraft 1.21.10?

Yes. 1.21.10 is the newest Minecraft version Only Optimized (FABRIC) 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 Only Optimized (FABRIC) support?

Everything the author has declared, from 1.19.4 up to 1.21.10. The full list is in the table above, with the Java runtime each version needs next to it.

Which loader does Only Optimized (FABRIC) 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 Only Optimized (FABRIC)?

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 Only Optimized (FABRIC) 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 Only Optimized (FABRIC)?

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 Only Optimized (FABRIC) 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 viJust Enough OptimizationJust Enough Optimization - Focused on low memory usage and higher avarege fps. Made for low-end pc so everyone can run MinecraftFastly 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.

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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