Compatibility
What works with Minecraft Build 21566819
Released 20 Jan 2026. Everything below comes from the projects' own published data, and each row says how we know.
Java requirement
Mojang does not publish a Java requirement for this version.
Server software
No server software in our catalogue has published a build for Build 21566819. For a snapshot that is normal: server projects usually wait for the full release.
Frequently asked
Which server software supports Build 21566819?
No server software in our catalogue has published a build for Build 21566819 yet.