How do I install Opsidian?

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 Opsidian work with?

The listing gives Minecraft 1.21.11. This is the version stated by the author or source site, not something we verified ourselves.

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Opsidian

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

by HarryBear123 · on Modrinth

Opsidium is a high-performance optimization engine. Built to maximize frame rates and eliminate lag. Free Minecraft Java modpack for 1.21.11.

⬇ Download on Modrinth

Open in MC Java Mods Get it on Google Play →

Quick facts

Edition: Minecraft Java
File type: .jar
Minecraft version listed: 1.21.11
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 Opsidian 1.0.2.mrpack
Download size: 271 KB
Download link checked 12 Nov 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