Compatibility

What works with Minecraft 25w20a

Minecraft 25w20a needs Java 21 or newer. Released 13 May 2025. Everything below comes from the projects' own published data, and each row says how we know.

Java requirement

Java 21 or newer

Published by Mojang for this exact version. An older runtime will not start it. Get a verified build.

Server software with builds

Real, downloadable builds for 25w20a.

Software	Build	Published	Size	Checksum	Download
Sponge	#2	28 Jul 2026	8.6 MB	Not published	jar ↗

Mod loaders

Support declared in each loader's own metadata.

Sponge25w20a-16.0.0-RC2212inferredsupported
Quilt Loader0.31.0-beta.4declaredsupported
Fabric Loader0.19.5declaredsupported

Frequently asked

Which Java version does Minecraft 25w20a need?

Java 21 or newer. Mojang publishes this requirement in the version metadata, so an older runtime will refuse to start the server.

Which server software supports 25w20a?

Sponge publish builds for 25w20a.

Everything about Minecraft 25w20a

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