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Convert Minecraft worlds between Java and Bedrock

Chunker is a powerful conversion tool that seamlessly transforms Minecraft worlds between Java Edition and Bedrock Edition, supporting versions from 1.8.8 to 1.21+.

Get StartedView CLI Guide
J
Java Edition
1.8.8 - 1.21.11
B
Bedrock Edition
1.12.0 - 1.26.0

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Quick start

Get up and running with Chunker in just a few steps

1

Install Chunker

Download the latest release from GitHub or build from source. Chunker requires Java 17 or higher.
# Download the CLI jar
wget https://github.com/HiveGamesOSS/Chunker/releases/latest/download/chunker-cli.jar
2

Prepare your world

Locate your Minecraft world directory. For Java Edition, worlds are typically in .minecraft/saves/. For Bedrock Edition, check your game’s storage location.
Make sure to backup your world before conversion to prevent any data loss.
3

Run the conversion

Execute Chunker with your input world, desired output format, and output directory.
java -jar chunker-cli.jar \
  -i "my_world" \
  -f BEDROCK_1_20_80 \
  -o "converted_world"
The conversion will show progress updates and complete with timing information.

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Explore documentation

Everything you need to master Chunker

CLI usage

Learn all CLI commands, flags, and advanced options for batch processing

Desktop app

Use the Electron-based GUI for visual world conversion

Supported versions

View all supported Minecraft versions for Java and Bedrock

Block mappings

Customize how blocks are converted between editions

Pruning

Optimize world size by removing unused chunks

API reference

Integrate Chunker into your Java applications

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Key features

Why developers choose Chunker

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Cross-edition conversion

Convert seamlessly between Java and Bedrock editions, preserving blocks, biomes, and world data

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Version support

Supports Minecraft versions from 1.8.8 to 1.21+, with regular updates for new releases

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Advanced customization

Custom block mappings, world pruning, dimension mapping, and converter settings for fine-grained control

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Multiple interfaces

Use the CLI for scripting and automation, or the desktop app for visual conversions with real-time feedback

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Ready to convert your worlds?

Join thousands of users who trust Chunker for reliable Minecraft world conversion

Install Chunker

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