Beta Platform v3.2.1

J2B MC

Bringing Bedrock Edition functionality into Java Edition.

Beta Â· Bedrock-style gameplay is partially implemented; Bedrock server connectivity is a working protocol scaffold pending real-server verification.

Why it exists

Purpose

Two editions, two sets of capabilities. J2B MC (Java 2 Bedrock) brings Bedrock gameplay features into Java Edition and targets direct Bedrock server connectivity — so Java players get the best of both worlds.

Who it's for

Players curious about Bedrock mechanics without switching editions, and technical players exploring cross-edition connectivity.

Key capabilities

Bedrock gameplay mode

Bedrock-style combat, movement, and parity mechanics in Java.

RakNet protocol client

A native Bedrock protocol stack: handshake, encryption, and packets.

World import

Import .mcworld files into Java worlds.

Compatibility

Versions & loaders

Property	Value
Loader / platform	Fabric
Latest version	3.2.1
Minecraft versions	1.21, 1.21.1, 1.21.2, 1.21.3, 1.21.4, 1.21.5, 1.21.6, 1.21.7, 1.21.8, 1.21.9, 1.21.10, 1.21.11

26.x builds are blocked upstream (no mappings).

Version history

Changelog

3.2.1

Gameplay parity refinements
Protocol stack hardening

Roadmap

Where it's going

Protocol scaffold

done

RakNet handshake, packets, and crypto.

Real-server connectivity

Xbox Live auth and verified real-server joins.

Full gameplay parity

later

Broaden Bedrock behaviour coverage.

FAQ

Questions, answered

Can I join Bedrock servers?

The RakNet client and login flow exist; online auth and real-server verification are still on the roadmap.

Does Bedrock gameplay change PvP?

Yes — combat and movement are reworked toward Bedrock behaviour.

Which versions are supported?

1.21 through 1.21.11.

Compatibility & limitations

What to know

Compatibility. 26.x builds are blocked upstream (no mappings).

Status. Bedrock-style gameplay is partially implemented; Bedrock server connectivity is a working protocol scaffold pending real-server verification.

Downloads