Download Paper 1.21.5 Server
The Paper server JAR for Minecraft 1.21.5, direct from the official source. Build details, release date and Java requirements below.
Java required
Java 21
Released
Jun 18, 2025
Build
114
File size
49 MB
Channel
Experimental
SHA-1 checksum
2ae6ae22adf417699746e0f89fc2ef6cb6ee050a5f6608cee58f0535d60b509e
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.