Download Paper 1.21.3 Server
The Paper server JAR for Minecraft 1.21.3, direct from the official source. Build details, release date and Java requirements below.
Java required
Java 21
Released
Mar 28, 2025
Build
83
File size
49 MB
Channel
Stable
SHA-1 checksum
87e973e1d338e869e7fdbc4b8fadc1579d7bb0246a0e0cf6e5700ace6c8bc17e
Setup
Start script (Linux/macOS)
java -Xms4G -Xmx4G --add-modules=jdk.incubator.vector -XX:+UseG1GC -jar paper.jar noguiStart script (Windows)
java -Xms4G -Xmx4G --add-modules=jdk.incubator.vector -XX:+UseG1GC -jar paper.jar --nogui
pauseOther Minecraft 1.21 builds of Paper
Other builds in the 1.21.x line. The newest stable is selected by default above.