Leaf 1.20 Server Jar Download

Newer patch: 1.20.6 Official source

Leaf 1.20 is the latest Leaf build for Minecraft 1.20, published on 12 Jun 2023. It requires Java 17 or newer and the jar is 55.9 MB. A newer patch in the same line is available: Leaf 1.20.6.

Download

Download leaf-1.20.jar55.9 MB

Downloads from github.com — Official — GitHub releases (Winds-Studio/Leaf).

The upstream does not publish a checksum for this file. MCJarHub computes a SHA-256 for such files on a schedule and shows it here once available — see how we source & verify.

Source: Official — GitHub releases (Winds-Studio/Leaf) No checksum published yet Last checked: Report a problem

Version facts

Minecraft release date
This build's date
ChannelRelease
Required JavaJava 17 or newer · Temurin 17
File size55.9 MB
Licence / termssee upstream
Upstream projectgithub.com

What changed

Release notes on GitHub What's new in Minecraft 1.20 (Minecraft Wiki)

Compatibility

Runs Bukkit, Spigot and Paper plugins built for Minecraft 1.20.

Players need a Minecraft: Java Edition 1.20 client. Other client versions can join only through a protocol plugin such as ViaVersion/ViaBackwards.

Minecraft 1.20 in other server software

Vanilla Paper Spigot Purpur Leaves Fabric Quilt Forge SpongeVanilla Mohist Arclight

Other Minecraft 1.20 server jars (Vanilla, Paper, Fabric, Forge…)

Known issues & safety notes

How to set up Leaf 1.20

  1. Install Java 17 or newer (e.g. Eclipse Temurin) and check it with java -version.
  2. Download the Leaf jar into an empty folder.
  3. Start it once with the script below; it creates eula.txt and stops.
  4. Set eula=true in eula.txt to accept the Minecraft EULA, then start again. Players join on port 25565.
  5. Put plugins (.jar) into plugins/ and restart.

Linux / macOS — start.sh

#!/bin/sh
# start.sh — Leaf 1.20
cd "$(dirname "$0")"
JAVA_MAJOR=$(java -version 2>&1 | awk -F'"' '/version/ {split($2, v, "."); print (v[1] == "1") ? v[2] : v[1]}')
if [ "$JAVA_MAJOR" -lt 17 ] 2>/dev/null; then
  echo "Java 17 or newer is required (found Java $JAVA_MAJOR)."
  exit 1
fi
java -Xms4G -Xmx4G -XX:+AlwaysPreTouch -XX:+DisableExplicitGC -XX:+ParallelRefProcEnabled -XX:+PerfDisableSharedMem -XX:+UnlockExperimentalVMOptions -XX:+UseG1GC -XX:G1HeapRegionSize=8M -XX:G1HeapWastePercent=5 -XX:G1MaxNewSizePercent=40 -XX:G1MixedGCCountTarget=4 -XX:G1MixedGCLiveThresholdPercent=90 -XX:G1NewSizePercent=30 -XX:G1RSetUpdatingPauseTimePercent=5 -XX:G1ReservePercent=20 -XX:InitiatingHeapOccupancyPercent=15 -XX:MaxGCPauseMillis=200 -XX:MaxTenuringThreshold=1 -XX:SurvivorRatio=32 -jar leaf-1.20.jar nogui

Windows — start.bat

@echo off
REM start.bat — Leaf 1.20
REM Needs Java 17 or newer: run "java -version" to check.
java -Xms4G -Xmx4G -XX:+AlwaysPreTouch -XX:+DisableExplicitGC -XX:+ParallelRefProcEnabled -XX:+PerfDisableSharedMem -XX:+UnlockExperimentalVMOptions -XX:+UseG1GC -XX:G1HeapRegionSize=8M -XX:G1HeapWastePercent=5 -XX:G1MaxNewSizePercent=40 -XX:G1MixedGCCountTarget=4 -XX:G1MixedGCLiveThresholdPercent=90 -XX:G1NewSizePercent=30 -XX:G1RSetUpdatingPauseTimePercent=5 -XX:G1ReservePercent=20 -XX:InitiatingHeapOccupancyPercent=15 -XX:MaxGCPauseMillis=200 -XX:MaxTenuringThreshold=1 -XX:SurvivorRatio=32 -jar leaf-1.20.jar nogui
pause

The JVM flags are Aikar's G1 flags as recommended by PaperMC. Customise RAM, flags and restart loop →

Rule of thumb: 2–4 GB for a few friends, 6–10 GB for a public server with plugins. Set -Xms equal to -Xmx and leave 1–1.5 GB for the operating system. How much RAM?

Docker

docker run -d -p 25565:25565 -e EULA=TRUE -e TYPE=LEAF -e VERSION=1.20 --name mc itzg/minecraft-server

Uses the community itzg/minecraft-server image, which downloads the file itself.

Upgrading

FAQ

What Java version does Leaf 1.20 need?

Leaf 1.20 needs Java 17 or newer. Running it on an older Java fails with an UnsupportedClassVersionError mentioning class file version 61.0.