ModsJava
Fast Chunk Unloader
Java mod listed for Minecraft 1.8–1.16. Downloads from the MC Java Mods app on Android.
⬇ Download on Spigot
Async Chunk Unloader
Are you running a survival / factions server or do you have a big map? Does it consistently lag when players go exploring around the map loading chunks? Maybe this can help!
Async Chunk Unloader looks to unload chunks that don't need to be loaded, without putting much stress on the server. It does this by asynchronously unloading chunks after checking that they are not in use.
It is currently in use on my own server, which is 1.12.2 Magma (Paper / Forge hybrid). It seems to take a lot of pressure off the server due to mods loading and generating massive custom structures in already laggy chunks.
All options are at the top of the script, and they have detailed descriptions above each.
You can run the unloader manually and automatically, you can check if a unload is currently happening, and you can check how many chunks are loaded at any given time.
Command: /unloader, /unloader clear
Requires: Skript-Reflect for all versions
1.9 +: Skript 2.5.3
1.8.8: Skript 2.5.3 fork for 1.8 (Untested)
Magma (Paper / Forge Hybrid): Skript 2.5.3 Magma fork and Magma
Here is a taster:
Discord: Jaeger_Danger#3523
Enjoy

Quick facts
- Edition: Minecraft Java
- File type: .jar
- Minecraft versions listed: 1.8, 1.9, 1.10
- 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 Spigot — 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.
Fast Chunk Unloader is a free Minecraft Java mod. Compatible with Minecraft 1.8, 1.9, 1.10, 1.11 and newer. Downloaded 2,083 times (via Spigot). Download it and open it directly in the game.