SpongeVanilla Snapshot 25w37a Server Jar Download

Also known as Sponge.

Experimental — snapshot Official source

SpongeVanilla Snapshot 25w37a build 25w37a-17.0.0-RC2342 is the latest SpongeVanilla build for Minecraft Snapshot 25w37a, published on 9 Sep 2025. It requires Java 21 or newer and the jar is 8.1 MB.

Download

Download spongevanilla-25w37a-17.0.0-RC2342-universal.jar8.1 MB

Downloads from repo.spongepowered.org — Official — SpongePowered.

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Version facts

Minecraft release date	9 Sep 2025
This build's date	9 Sep 2025
Build	25w37a-17.0.0-RC2342
Builds for this version	2
Channel	Preview (weekly)
Required Java	Java 21 or newer · Temurin 21
File size	8.1 MB
Licence	MIT
Upstream project	spongepowered.org

What changed

Newest upstream commits:

#25w37a-17.0.0-RC2342 · 9 Sep 2025 feat(minecraft): update to 25w37a

What's new in Minecraft Snapshot 25w37a (Minecraft Wiki)

Compatibility

Runs Sponge plugins built for the matching SpongeAPI version.

Players need a Minecraft: Java Edition Snapshot 25w37a client on the same version.

Minecraft Snapshot 25w37a in other server software

Snapshot Fabric Quilt

Known issues & safety notes

Preview builds are experimental: they can corrupt or irreversibly upgrade worlds, and most plugins and mods do not support them yet. Test on a copy of your world.
Known issues: search SpongeVanilla's issue tracker for 25w37a

How to set up SpongeVanilla Snapshot 25w37a

Install Java 21 or newer (e.g. Eclipse Temurin) and check it with java -version.
Download the SpongeVanilla jar into an empty folder.
Start it once with the script below; it creates eula.txt and stops.
Set eula=true in eula.txt to accept the Minecraft EULA, then start again. Players join on port 25565.

Linux / macOS — `start.sh`

#!/bin/sh
# start.sh — SpongeVanilla 25w37a
cd "$(dirname "$0")"
JAVA_MAJOR=$(java -version 2>&1 | awk -F'"' '/version/ {split($2, v, "."); print (v[1] == "1") ? v[2] : v[1]}')
if [ "$JAVA_MAJOR" -lt 21 ] 2>/dev/null; then
  echo "Java 21 or newer is required (found Java $JAVA_MAJOR)."
  exit 1
fi
java -Xms4G -Xmx4G -jar spongevanilla-25w37a-17.0.0-RC2342-universal.jar nogui

Windows — `start.bat`

@echo off
REM start.bat — SpongeVanilla 25w37a
REM Needs Java 21 or newer: run "java -version" to check.
java -Xms4G -Xmx4G -jar spongevanilla-25w37a-17.0.0-RC2342-universal.jar nogui
pause

Rule of thumb: 2–4 GB for a few friends, 6–10 GB for a public server with plugins. Set -Xms equal to -Xmx and leave 1–1.5 GB for the operating system. How much RAM?

Docker

docker run -d -p 25565:25565 -e EULA=TRUE -e TYPE=SPONGEVANILLA -e VERSION=25w37a --name mc itzg/minecraft-server

Uses the community itzg/minecraft-server image, which downloads the file itself.

Upgrading

Newer: SpongeVanilla 1.21.9 Release Candidate 1
Previous: SpongeVanilla Snapshot 25w36b
How to update a Minecraft server safely

FAQ

What Java version does SpongeVanilla Snapshot 25w37a need?

SpongeVanilla Snapshot 25w37a needs Java 21 or newer. Running it on an older Java fails with an UnsupportedClassVersionError mentioning class file version 65.0.

Is SpongeVanilla Snapshot 25w37a safe for my survival world?

Only on a copy. Preview versions are experimental and upgrade worlds irreversibly; keep a backup and don't switch a live world to a snapshot, pre-release or release candidate.