Download Paper 1.21.1 Server
The Paper server JAR for Minecraft 1.21.1, direct from the official source. Build details, release date and Java requirements below.
Java required
Java 21
Released
Mar 28, 2025
Build
133
File size
47 MB
Channel
Stable
SHA-1 checksum
39bd8c00b9e18de91dcabd3cc3dcfa5328685a53b7187a2f63280c22e2d287b9
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.