Overview #
Recreate Minecraft Bedrock Edition into your Java world using a simple button — all mechanics, all the bugs, everything Bedrockified inside your Java Edition world. One press toggles Bedrock-style gameplay, physics, combat, mob AI, redstone and more: 161 sub-systems across 13 phases (combat, physics, movement, mob AI, redstone, enchanting, food and more), each governed by one of 27 toggleable flags you control from the config screen (B key / Mod Menu). The native RakNet client (ECDH + AES-256-CFB8 encryption) lets Java players join Bedrock servers directly, and Bedrock .mcworld files can be imported into Java worlds. The core is validated against all 12 versions with a zero-crash-risk feature-parity matrix.
Recreate Minecraft Bedrock Edition into your Java world using a simple button — all mechanics, all the bugs, everything Bedrockified inside your Java Edition world. One press Bedrock-ifies gameplay, physics, combat, mob AI, redstone and more — and lets Java players join Bedrock servers directly, with 161 mechanics across 12 versions, each individually toggleable.
Quick start #
- Install the J2B MC mod for your 1.21.x version (1.21 → 1.21.11 published on v3.2.1; 26.x builds are blocked upstream — no mappings).
- Bedrock-ify a world: press the Bedrock-ify button at world creation, or toggle it later on an existing world from the config screen.
- Open the config screen (B key or Mod Menu) and pick your flags — 27 flags govern the 161 sub-systems across 13 phases.
- Explore the /j2b command suite for in-game control.
- Try PvP and redstone changes first in a test world — combat (attack cooldown, knockback, crits), movement, physics, mob AI and redstone all move toward Bedrock behaviour.
- Import a Bedrock .mcworld file into a Java world when you want Bedrock terrain in Java.
- For cross-edition connectivity, run /j2b connect <host> <port> — online Bedrock auth is still being verified against real servers.
Configuration #
Every mechanic group is governed by one of 27 flags, controlled from the config screen (B key or Mod Menu entry) or the /j2b command suite. Everything is individually toggleable.
| Setting | Default | Description |
|---|---|---|
| 27 mechanic flags | Varies by flag | Control the 161 sub-systems across 13 phases: combat, physics, movement, mob AI, redstone, enchanting, food and more. |
| Bedrock-ify toggle | Off | Applies Bedrock mechanics to a world — at creation via the button, or later from the config screen. |
| /j2b command suite | — | Explore and control the mod from in-game commands. |
Frequently asked questions #
Can I join Bedrock servers?
Does Bedrock gameplay change PvP?
How much can I control?
Which versions are supported?
Can I import Bedrock worlds?
Is it safe on servers?
How do I apply Bedrock mechanics to an existing world?
Can I pick individual mechanics?
Compatibility #
| Property | Value |
|---|---|
| Loader / platform | Fabric |
| 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 |
| Latest version | 3.2.3 |
26.x builds are blocked upstream (no mappings).