Pluto for Minecraft 1.21.9
8 builds of Pluto published for Minecraft 1.21.9, newest first. Every download links to the project’s own release.
- Latest build
- #35
- Java required
- Java 21 or newer
- Builds
- 8
- Newest published
- 13 Apr 2026
Pluto builds for 1.21.9
Newest first. The checksum is the project's own, where it publishes one.
| Build | Channel | Published | Size | Download |
|---|---|---|---|---|
| #35 | beta | 13 Apr 2026 | 51.4 MB | server.jar |
| #34 | beta | 9 Apr 2026 | 51.4 MB | server.jar |
| #33 | beta | 8 Feb 2026 | 51.4 MB | server.jar |
| #32 | beta | 27 Nov 2025 | 51.4 MB | server.jar |
| #31 | beta | 15 Oct 2025 | 51.4 MB | server.jar |
| #30 | beta | 7 Oct 2025 | 51.4 MB | server.jar |
| #29 | beta | 7 Oct 2025 | 51.4 MB | server.jar |
| #28 | beta | 7 Oct 2025 | 51.4 MB | server.jar |
Pluto on 1.21.9: common questions
Does Pluto support Minecraft 1.21.9?
Yes. 8 builds have been published for 1.21.9, the newest being build 35. 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 1.21.9?
Java 21 or newer. The requirement comes from Minecraft 1.21.9 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 1.21.9?
The newest one, build 35, 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.