Download Paper 1.21.9 Server
The Paper server JAR for Minecraft 1.21.9, direct from the official source. Build details, release date and Java requirements below.
Java required
Java 21
Released
Oct 7, 2025
Build
59
File size
51 MB
Channel
Experimental
SHA-1 checksum
aec002e77c7566e49494fdf05430b96078ffd1d7430e652d4f338fef951e7a10
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.