SpongeVanilla Snapshot 25w35a Server Jar Download

Also known as Sponge.

Experimental — snapshot Official source

SpongeVanilla Snapshot 25w35a build 25w35a-17.0.0-RC2306 is the latest SpongeVanilla build for Minecraft Snapshot 25w35a, published on 26 Aug 2025. It requires Java 21 or newer and the jar is 8.1 MB.

Download

Download spongevanilla-25w35a-17.0.0-RC2306-universal.jar8.1 MB

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

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Version facts

Minecraft release date	26 Aug 2025
This build's date	26 Aug 2025
Build	25w35a-17.0.0-RC2306
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:

#25w35a-17.0.0-RC2306 · 26 Aug 2025 chore(update): merge upstream changes

What's new in Minecraft Snapshot 25w35a (Minecraft Wiki)

Compatibility

Runs Sponge plugins built for the matching SpongeAPI version.

Players need a Minecraft: Java Edition Snapshot 25w35a client on the same version.

Minecraft Snapshot 25w35a 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 25w35a

How to set up SpongeVanilla Snapshot 25w35a

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 25w35a
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-25w35a-17.0.0-RC2306-universal.jar nogui

Windows — `start.bat`

@echo off
REM start.bat — SpongeVanilla 25w35a
REM Needs Java 21 or newer: run "java -version" to check.
java -Xms4G -Xmx4G -jar spongevanilla-25w35a-17.0.0-RC2306-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=25w35a --name mc itzg/minecraft-server

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

Upgrading

FAQ

What Java version does SpongeVanilla Snapshot 25w35a need?

SpongeVanilla Snapshot 25w35a needs Java 21 or newer. Running it on an older Java fails with an UnsupportedClassVersionError mentioning class file version 65.0.

Is SpongeVanilla Snapshot 25w35a 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.