Minecraft 1.20 Pre-Release 6 Server Jar Download

Version facts

What changed

Newest upstream commits:

• #1 · 25 May 2023 "item": "minecraft:air" can no longer be used in datapack recipes
• Ingredients in array form are now also allowed in smithing_trim and smithing_transform recipes on fields template, base and addition Those fields also allow empty arrays, which signalize that slot needs to be left empty
• Those fields also allow empty arrays, which signalize that slot needs to be left empty
• Those fields also allow empty arrays, which signalize that slot needs to be left empty
• MC-237042 Killing players in the sneaking state that have their sneak option set to "Toggle" in their accessibility settings, results in other players not being able to see them in this state when they respawn

Compatibility

No plugins or mods — the unmodified game exactly as Mojang ships it (data packs still work).

Players need a Minecraft: Java Edition 1.20 Pre-Release 6 client on the same version.

Minecraft 1.20 Pre-Release 6 in other server software

Known issues & safety notes

• Preview builds are experimental: they can corrupt or irreversibly upgrade worlds, and most plugins and mods do not support them yet. Test on a copy of your world.

How to set up Minecraft 1.20 Pre-Release 6

1. Install Java 17 or newer (e.g. Eclipse Temurin) and check it with java -version.
2. Download server.jar from Mojang (button above) 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.

#!/bin/sh
# start.sh — Minecraft 1.20-pre6
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 -jar server.jar nogui

@echo off
REM start.bat — Minecraft 1.20-pre6
REM Needs Java 17 or newer: run "java -version" to check.
java -Xms4G -Xmx4G -jar server.jar nogui
pause

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=VANILLA -e VERSION=1.20-pre6 --name mc itzg/minecraft-server

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

Upgrading

• Newer: Minecraft 1.20 Pre-Release 7
• Previous: Minecraft 1.20 Pre-Release 5
• How to update a Minecraft server safely