Sponge for Minecraft 1.21.9
7 builds of Sponge published for Minecraft 1.21.9, newest first. Every download links to the project’s own release.
- Latest build
- #7
- Java required
- Java 21 or newer
- Builds
- 7
- Newest published
- 28 Jul 2026
Sponge builds for 1.21.9
Newest first. The checksum is the project's own, where it publishes one.
| Build | Channel | Published | Size | Download |
|---|---|---|---|---|
| #7 | beta | 28 Jul 2026 | 8.2 MB | spongevanilla-1.21.9-17.0.0-RC2374-universal.jar |
| #6 | beta | 28 Jul 2026 | 8.2 MB | spongevanilla-1.21.9-17.0.0-RC2373-universal.jar |
| #5 | beta | 28 Jul 2026 | 8.2 MB | spongevanilla-1.21.9-17.0.0-RC2372-universal.jar |
| #4 | beta | 28 Jul 2026 | 8.2 MB | spongevanilla-1.21.9-17.0.0-RC2371-universal.jar |
| #3 | beta | 28 Jul 2026 | 8.2 MB | spongevanilla-1.21.9-17.0.0-RC2369-universal.jar |
| #2 | beta | 28 Jul 2026 | 8.2 MB | spongevanilla-1.21.9-17.0.0-RC2367-universal.jar |
| #1 | beta | 27 Jul 2026 | 8.2 MB | spongevanilla-1.21.9-17.0.0-RC2374-universal.jar |
Sponge on 1.21.9: common questions
Does Sponge support Minecraft 1.21.9?
Yes. 7 builds have been published for 1.21.9, the newest being build 7. 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 Sponge 1.21.9?
Java 21 or newer. The requirement comes from Minecraft 1.21.9 itself rather than from Sponge, so it applies to any server software running this version. A newer Java than that is fine.
Which Sponge build should I run on 1.21.9?
The newest one, build 7, published 4 h 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 Sponge'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.