Ksyxis

Mod

by VidTu

Speed up your world loading by removing unneeded chunks.

Type

Mod

CurseForge Downloads

8,964,644

CurseForge ID

537533

Modrinth Downloads

6,809,919

Modrinth ID

2ecVyZ49

Last Updated

Jul 28, 2026

Description

⚠️ Warning

Ksyxis won't work for 1.21.9 and newer versions. Mojang removed spawn chunks in 25w31a, therefore removing spawn chunks via mods is no longer needed, as this optimization is built-in into Minecraft now.

Removing other chunks (e.g., chunks around the player in singleplayer) makes no sense, they will be loaded anyway when you join the server.

Older Minecraft versions will be supported for a reasonable time.

Ksyxis

Speed up your world loading by removing spawn chunks.

Downloads

Dependencies

This mod needs Mixin and nothing else. Usually, it's provided by your mod loader.

Fabric Loader, Quilt Loader, Forge, NeoForge, Legacy Fabric, or Ornithe
Minecraft (1.8 -> 1.21.8)
Forge 1.8-1.15.2 only: Any Mixin provider, at your choice (such as MixinBootstrap, MixinBooter, UniMixins, or any other)

Fabric API is NOT required.

About

Minecraft has a concept of spawn chunks. These chunks are located at the world creation point (where you have been spawned for the first time) and are always loaded. Depending on the version, there are either 441 or 25 spawn chunks always loaded while you're playing. Most players, however, don't need these chunks as they venture far away from spawn and come back only occasionally. To these players, the creation and loading of spawn chunks is a waste of time and performance. This mod completely disables spawn chunks in the game.

Note: Spawn chunks are sometimes used by farms and technical contraptions. If you'll need them, you can always delete the mod later to re-enable the spawn chunks.

Ksyxis Demo GIF

FAQ

Q: I need help, have some questions, or have some other feedback.
A: You can join the Discord server.

Q: Where can I download this mod?
A: Modrinth, CurseForge, or GitHub Releases. You can also find unstable builds at GitHub Actions. You will need a GitHub account to download these.

Q: This mod doesn't speed up anything.
A: The effect may not be noticeable on high-end PCs. This mod is designed primarily for low-end devices. Nevertheless, there is a video.

Q: Which mod loaders are supported?
A: Forge, Fabric, Quilt, NeoForge, Legacy Fabric, and Ornithe (for both Fabric and Quilt).

Q: Which Minecraft versions are supported?
A: Minecraft 1.8 through 1.21.8.

Q: Where are the Forge, Fabric, Quilt, NeoForge, etc. versions?
A: All in the same file.

Q: Do I need Fabric API or Quilt Standard Libraries?
A: No, but you can install these for other mods.

Q: Is this mod open source?
A: Yes. (Licensed under MIT License)

Q: Is this mod stable for use?
A: It should be. No guarantee, though. At least it should not break your worlds. You can always uninstall the mod and load worlds without Ksyxis.

Q: Is this mod client-side or server-side?
A: This mod works on the logical server side. That is, it does have an effect in singleplayer and on a dedicated (standalone) server. It has no effect on the client when playing in multiplayer. You can install it into your client or your server without any requirements for it to be installed on the other side.

Q: How to force-load chunks if the spawn chunks have been removed?
A: If you really need to force-load chunks, load individual chunks with the /forceload command in 1.13 or newer. For older versions, you can search for some mod that force-loads chunks.

Q: I've found a bug.
A: Report it here. If you are not sure whether this is a bug or a simple question, you can join the Discord. Report security vulnerabilities here.

Q: Can I use this in my modpack?
A: Sure. Credit (e.g., a link to the mod's GitHub page) is appreciated but is not required. Monetization and redistribution are allowed as per the MIT License.

Q: It says Ksyxis: No Mixin found.
A: If you're using Forge 1.15.2 or older, you may need to install MixinBootstrap, MixinBooter, UniMixins, or any other Mixin provider of your choice. If you're using Forge 1.16 or newer, or any version of Fabric/Quilt/NeoForge/Ornithe, you don't need to install anything, and this is a bug.