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Pluto for Minecraft 1.21.4

8 builds of Pluto published for Minecraft 1.21.4, newest first. Every download links to the project’s own release.

Latest build
#40
Java required
Java 21 or newer
Builds
8
Newest published
12 Apr 2026

Pluto builds for 1.21.4

Newest first. The checksum is the project's own, where it publishes one.

All versions
BuildChannelPublishedSizeDownload
#40release12 Apr 202649.4 MBserver.jar
#39release9 Apr 202649.4 MBserver.jar
#38release8 Feb 202649.4 MBserver.jar
#37release29 Jun 202549.4 MBserver.jar
#36release9 Jun 202549.4 MBserver.jar
#35release5 Jun 202549.4 MBserver.jar
#34release3 Jun 202549.4 MBserver.jar
#33release22 May 202549.4 MBserver.jar

Pluto on 1.21.4: common questions

Does Pluto support Minecraft 1.21.4?

Yes. 8 builds have been published for 1.21.4, the newest being build 40. This is not a declared claim: each build below is a real file the project released for this version.

Which Java version do I need for Pluto 1.21.4?

Java 21 or newer. The requirement comes from Minecraft 1.21.4 itself rather than from Pluto, so it applies to any server software running this version. A newer Java than that is fine.

Which Pluto build should I run on 1.21.4?

The newest one, build 40, published 3 mo ago. Later builds for the same Minecraft version are bug fixes and performance work, so there is rarely a reason to run an older one deliberately.

Is this download official?

Yes. Every link points at Pluto's own release or API. MCReference does not mirror, re-host or repackage a jar; where the project publishes a SHA-256 we show it so you can verify the file you got.