How do I install Just Optimized. [JO.]?

Install the matching mod loader (Forge, Fabric or NeoForge) for your Minecraft version. Download the .jar. Put it in the .minecraft/mods folder and launch that loader profile. Opens on Modrinth — not every file is mirrored on our own servers.

What Minecraft version does Just Optimized. [JO.] work with?

The listing gives Minecraft 1.21.1. This is the version stated by the author or source site, not something we verified ourselves.

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Just Optimized. [JO.]

Java modpack listed for Minecraft 1.21. Downloads from the MC Java Mods app on Android.

by Flingo · on Modrinth

⬇ Download on Modrinth

Open in MC Java Mods Get it on Google Play →

Just Optimized.

What this modpack does?

This modpack greatly optimizes Minecraft by using the Vulkan Mod which changes Minecrafts whole rendering engine and also optimizing a bit of logic in Minecraft

FAQ

Will This modpack work with other mods? Unfortunetly no. This modpack is based around the Vulkan Mod which changes the whole rendering engine which most of the time breaks other mods. Can I use shaders? Yes, but there's currently only 1 shader for Vulkan which isn't too great. You can enable it by going to- Options/Video Settings/Beryl Graphics/Use shaders - ON

Quick facts

Edition: Minecraft Java
File type: .jar
Minecraft version listed: 1.21.1
How to install: Install the matching mod loader (Forge, Fabric or NeoForge) for your Minecraft version. → Download the .jar. → Put it in the .minecraft/mods folder and launch that loader profile.
Where to get it: Opens on Modrinth — not every file is mirrored on our own servers.

Install steps are the general flow for this file type — How to install Minecraft Java mods & modpacks walks through it step by step.

File checked by MCModsHub

Downloads as JustOptimized_1.0.0.mrpack
Download size: 695 KB
Download link checked 28 Oct 2026 — working

These come from our own check of the pack file, not from the source page.

Explore more

All Modpacks for Java All Minecraft Java mods Java mods for 1.21