---
title: "Pregenerate your Minecraft world with Chunky"
url: https://help.endercloud.in/docs/pregenerate-your-world-with-chunky
category: "Minecraft Hosting › Troubleshooting & Performance"
type: Guide
tags: ["lag", "performance", "plugins", "world"]
keywords: "chunky, pregen, pre-generate, pregenerate chunks, chunky radius, chunky start, chunky worldborder, world border, elytra lag, exploring lag, chunk generation lag, new chunks lag, pregenerate world, pregen world, chunky plugin, chunk pregeneration, how to use chunky, chunky pause, lag when exploring"
difficulty: intermediate
time: "10 minutes (plus generation time)"
updated: 2026-11-14
source: Endercloud Knowledge Base (official)
---

# Pregenerate your Minecraft world with Chunky

> Generating new land is one of the heaviest jobs a server does. Use Chunky to generate the world ahead of time, then add a world border so players never trigger it during play.

Every time a player walks or flies into land nobody has visited, the server has to generate those chunks from scratch. That is one of the main causes of lag on survival servers. **Chunky** is a free tool that generates the world in advance, so later the server only has to load chunks that already exist.

## Step 1: Install Chunky

-   **Paper, Purpur or Spigot:** open **Plugins** → **Browse Plugins**, search for Chunky and click **Install**.
    
-   **Fabric, Forge or NeoForge:** open **Mods** → **Browse Mods**, set the **Mod Loader** and **Version** filters to match your server, search for Chunky and click **Install**.
    

Restart the server after installing. You can also download Chunky from Modrinth or CurseForge and upload it with **Files**. Make a backup in **Backups** before your first big run.

## Step 2: Choose the area

Run these in the **Console** (no slash), or in game with a slash as an operator.

1.  Pick the world:
    
    ```
    chunky world world
    ```
    
    On Paper and Purpur the other dimensions are `world_nether` and `world_the_end`. On Fabric, Forge and NeoForge use `minecraft:the_nether` and `minecraft:the_end`.
    
2.  Set the centre. Use the world spawn, or give coordinates:
    
    ```
    chunky spawn
    chunky center 0 0
    ```
    
3.  Set the radius in blocks. A radius of 5000 covers 10,000 × 10,000 blocks:
    
    ```
    chunky radius 5000
    ```
    
    For a small group server, 3000 to 5000 is plenty. Bigger areas take much longer and use more disk space.
    

Already have a world border? Use it as the area instead:

```
chunky worldborder
```

## Step 3: Start and watch the progress

```
chunky start
```

Chunky prints its progress in the console. Useful commands:

| Command | What it does |
| --- | --- |
| `chunky progress` | Shows how far it has got |
| `chunky pause` | Pauses and saves progress |
| `chunky continue` | Carries on from where it stopped (also after a restart) |
| `chunky cancel` | Stops the task completely |
| `chunky quiet 60` | Prints progress only every 60 seconds |

> **Tip:**
> Generation uses a lot of CPU. Run it when few players are online, for example overnight, and pause it during busy hours.

## Step 4: Add a world border

Pregenerating only helps if players stay inside the generated area. Set a vanilla world border the same size. The border size is a **diameter**, so use twice your Chunky radius:

```
worldborder center 0 0
worldborder set 10000
```

Use the same centre you used for Chunky. For the Nether, remember that 1 block there equals 8 blocks in the Overworld, so a smaller radius is usually enough.

## Check your disk space

Generated chunks are saved to disk, and a large radius can add several gigabytes. Watch the Disk usage in the panel header while it runs. If you get close to your plan's limit, pause, reduce the radius, or upgrade your plan.

## Frequently asked questions

**Q: Can players stay online while Chunky runs?**

Yes, but they may notice lag because generation uses CPU. Pausing during busy hours is the easiest fix.

**Q: Do I need to keep Chunky installed afterwards?**

No. Once the area is generated you can remove it, though it is handy to keep for when you expand the border later.

**Q: Does pregenerating fix all lag?**

It removes lag from creating new land. Lag from farms, entities or plugins needs other fixes. Use [spark](/docs/find-lag-with-spark-profiler) to find them, and read [How to fix server lag](/docs/how-to-fix-minecraft-server-lag).