CurseForge · Minecraft mod
Shirium
A Forge optimization mod focused on smoother gameplay, rendering performance, and reduced stuttering.
Quick answer
Which Shirium release should I use?
Shirium SR - 21.1 - 1.0.1 targets 1.21.1 with Forge. The project page does not say whether this file belongs on the client, dedicated server, or both. No extra mods listed for this file.
Where it goes
Is Shirium required on the client, server, or both?
The project page does not say whether this file belongs on the client, dedicated server, or both.
The source does not explicitly classify this release as client-only or server-only.
What else does Shirium SR - 21.1 - 1.0.1 need?
SR - 21.1 - 1.0.1. Change the file and its required mods may change too.
This file does not list any required mods. Do not add a library just because a different file uses it.
This file does not list any required or optional mods.
Before you install it
Add Shirium without breaking your instance.
Built for Shirium SR - 21.1 - 1.0.1. Pick another file and the loader, install side or required mods may change.
- 01
Stick to this file
Use SR - 21.1 - 1.0.1. It targets 1.21.1 with Forge; another release may have different loader, side or dependency requirements.
- 02
Bring the mods it needs
This file does not list any required mods. Do not add a library just because a different file uses it.
- 03
Put it on the correct side
The project page does not say whether this file belongs on the client, dedicated server, or both.
- 04
Pick the file you checked
Use the “Get this file” button beside SR - 21.1 - 1.0.1. It opens that exact file at the source.
About this project
What does Shirium add?
⚡ Shirium
Shirium is an optimization mod for Minecraft Forge designed to make the game run smoother without changing how it looks or plays.
The mod improves several parts of the rendering, mainly everything related to chunks and the way Minecraft prepares and sends that information to the GPU. In practice, this can mean more FPS, fewer stutters, and more stable frame times, especially while exploring or when the game is loading and rebuilding terrain.
What does it improve?
Shirium aims to improve both the average performance and the stability of the game. It doesn’t just focus on raising the FPS count, but also on reducing those little spikes that make Minecraft feel less smooth.
You can tell that the mod is installed thanks to the new settings interface
Among the improvements you might notice are:
More FPS in situations limited by chunk rendering.
Better 1% lows and 0.1% lows.
Fewer frametime spikes and micro-stutters.
More efficient chunk loading and rebuilding.
Less unnecessary CPU work.
More efficient use of memory and communication with the GPU.
Compatibility
Shirium is designed to work well with most Forge content mods, but there may be mods that don't work correctly with it and there may be bugs
Extra
The mod has completely changed the architecture and will also move to a new stage, and it is recommended to install the mod from version 1.0.1 for all the new improvements and implementations
The mod is in development and future updates will come, improving compatibility, performance, and many other things.
Project description from CurseForge.
Pick your setup
Shirium by Minecraft version and loader
Choose the version and loader you play, then open the matching release.
1.21
1 loader build1.20.6
1 loader build1.20.4
1 loader build1.20.3
1 loader build1.20.2
1 loader build1.20.1
1 loader build1.20
1 loader buildCheck the dependencies, then try the file in a copied instance before changing a world you care about.
Recent files
Shirium versions and loaders
SR - 21.1 - 1.0.1
shirium.fg.21.1-1.0.1.jar
15 Aug 2026
SR - 21 - 1.0.1
shirium.fg.21-1.0.1.jar
15 Aug 2026
SR - 20.6 - 1.0.1
shirium.fg.20.6-1.0.1.jar
15 Aug 2026
SR - 20.4 - 1.0.1
shirium.fg.20.4-1.0.1.jar
14 Aug 2026
SR - 20.3 - 1.0.1
shirium.fg.20.3-1.0.1.jar
14 Aug 2026
SR - 20.2 - 1.0.1
shirium.fg.20.2-1.0.1.jar
14 Aug 2026
SR - 20.1 - 1.0.1
shirium.fg.20.1-1.0.1.jar
14 Aug 2026
1.20.4 - 0.0.1
Shirium.fg.20.4-0.0.1.jar
23 Mar 2026
1.20.3 - 0.0.1
Shirium.fg.20.3-0.0.1.jar
23 Mar 2026
1.20.2 - 0.0.1
Shirium.fg.20.2-0.0.1.jar
23 Mar 2026
1.20.1 - 0.0.1
Shirium.fg.20.1-0.0.1.jar
23 Mar 2026
1.20 - 0.0.1
Shirium.fg.20-0.0.1.jar
23 Mar 2026
Looking for an older file? The official CurseForge project page is in Resources.