Pregenerate a Java world

Last updated: July 23, 2026

This guide shows you how to use Chunky to generate Minecraft Java Edition chunks before players explore them.

Pregeneration creates and saves chunks before players explore them. A chunk is a 16×16 block section of the world that the server generates and saves. This shifts terrain-generation work to a controlled period but uses additional storage.

Before you begin

Use Java server software that supports plugins, such as Paper or another compatible Bukkit-based server.
Install a Chunky release compatible with the server's Minecraft version.
Create a backup.
Choose a reasonable center and radius based on available storage.

Pregenerate with Chunky

Install Chunky — Log in to the NolimitHost Game Panel at https://panel.nolimithost.cc/ and select your Minecraft Java server. In the left sidebar, click File Manager and install the compatible Chunky .jar in /plugins.
Start the server — Start the server and open the Console in the Game Panel to confirm that Chunky loads successfully.
Select the world — In the console, replace world with the active world name.
```
chunky world world
```
Set the center and radius — Choose the center coordinates and radius in blocks.
```
chunky center 0 0
chunky radius 5000
```
Start generation — Run the task and monitor the console and storage usage.
```
chunky start
```

Run chunky help for the commands supported by the installed Chunky version.

Warning: A large radius can consume substantial storage and server resources. Start with a smaller area and do not assume a completion time.

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