minecraft-world-downloader

A Minecraft world downloader that works by intercepting & decrypting network traffic between the client and the server to read & save chunk data. Chunks can be sent back to the client to extend the render distance.

Downloads

Latest Windows release (GUI): world-downloader.exe

Cross-platform jar (GUI & commandline): world-downloader.jar

Features

• Requires no client modifications and as such works with every game client, vanilla or not
• Automatically merge into previous downloads or existing worlds
• Save chests and other inventories by opening them
• Extend the client's render distance by sending chunks downloaded previously back to the client
• Overview map of chunks that have been saved:

Requirements

• Java 16 or higher
• Minecraft version 1.12.2+ // 1.13.2+ // 1.14.1+ // 1.15.2+ // 1.16.2+ // 1.17+

Basic usage

Download the latest release and run it. Enter the server address in the address field and press start. Instead of connecting to the server itself, connect to

localhost

Additional settings can be changed in the other tabs of the settings window.

Commandline

Download the cross-platform

world-downloader.jar

java -jar world-downloader.jar -s address.to.server.com

Then connect to

localhost

world/

Other arguments can be specified to change the behaviour of the downloader. For example, render distance extending can be enabled by setting the render distance with

-r [distance]

java -jar world-downloader.jar -s address.to.server.com -r 16

Options

| Parameter | Default | Description | | --- | --- | --- | | --server | required | Server address | | --port | 25565 | Server port | | --local-port | 25565 | Port on which the downloader will run. | | --output | world | World output director | | --no-gui | | Disable the GUI, useful for running in environments that don't support GUIs. | | --render-distance | 0 | When larger than the server's render distance, send known chunks back to the client | | --mark-unsaved-chunks | true | When enabled, marks unsaved chunks red in the GUI. | | --minecraft-dir | %appdata%/.minecraft | Path to your Minecraft installation, used for Mojang authentication | | --username | none | Set your Minecraft username, used instead of the Minecraft path for authentication | | --token | none | Set the Minecraft access token, used instead of the Minecraft path for authentication |

Additional options are available by running

java -jar world-downloader.jar --help

Running on Linux

To easily download the latest release using the terminal, the following commands can be used:

wget https://github.com/mircokroon/minecraft-world-downloader/releases/latest/download/world-downloader.jar
java -jar world-downloader.jar -s address.to.server.com

When running headless Java, the GUI should be disabled by including the GUI option:

java -jar world-downloader.jar -s address.to.server.com --no-gui

Some linux distributions may require

-Djdk.gtk.version=2

java -Djdk.gtk.version=2 -jar world-downloader.jar

Building from source

sudo apt-get install default-jdk maven

sudo pacman -S --needed jdk-openjdk maven

git clone https://github.com/mircokroon/minecraft-world-downloader
cd minecraft-world-downloader
mvn package
java -jar ./target/world-downloader.jar -s address.to.server.com