Pre-releaseDownload Minecraft 1.21.11-pre4 Server
The Minecraft 1.21.11-pre4 snapshot server JAR, direct from Mojang. Release date, file size, checksum and Java requirement below.
Snapshot for Minecraft 1.21
Java required
Java 21
Released
Dec 1, 2025
File size
54 MB
Channel
Pre-release
SHA-1 checksum
db1a9f24a4610f2f71e8991c11f70a4b62750c1b
Or get a Minecraft 1.21.11-pre4 server online
No Java install, no port forwarding, no PC left running. Pick Minecraft 1.21.11-pre4 in our panel and your friends can join right away.
Server RAM
$2/ month
Compare all plans⚡ Not for a production server
Back up your world before you run this build. A snapshot can convert a world to a newer data format that an older release refuses to load, plugins and mods do not work on it, and anything in it can change or disappear in the next snapshot.
What's new in Minecraft 1.21.11-pre4
Minecraft 1.21.11-pre4 was released on Dec 1, 2025.
- Changes
- 6
- Technical changes
- 1
- Bug fixes
- 9
Figures taken from the official release notes for this version.
How to run a snapshot server
Exactly like any vanilla server. Put the JAR in an empty folder on its own, run it once, accept the EULA, then start it again. Keep it in a separate folder from your release server so the two never share a world.
Start script (Linux/macOS)
java -Xms2G -Xmx4G -jar server.jar noguiThe first launch stops immediately and writes an eula.txt file. Open it, set eula=true, and start the server again. That line is your agreement to Mojang's EULA and is required to run any Minecraft server.
2 GB boots a snapshot for a couple of players. For a real player count, size it with the Minecraft RAM calculator
Your PC or ours
What changes when we host it
| Feature | On your own PC | Hosted with us |
|---|---|---|
| Online when your PC is off | No | Yes, 24/7 |
| Port forwarding | Router setup needed | Not needed |
| Changing versions | Download and reinstall | Pick it in the panel |
| CurseForge and Modrinth modpacks | Manual install | One-click Modpacks tab |
| Backups | Your job | Automatic |
| DDoS protection | None | Included |