This is the most time-consuming part of the conversion process. You cannot copy Java code into Bedrock. Instead, you must read what the Java mod does and recreate it using Bedrock's native tools. Simple Changes (JSON)
If the .jar only contains new items, blocks, or entities (the visual parts), you can "port" them more easily.
textures/ (with subfolders like blocks/ , items/ , and entity/ ) models/ (with a subfolder for entity/ ) texts/ 2. Create the manifest.json Convert Jar To Mcaddon
import world, system from '@minecraft/server'; system.runInterval(() => for (let player of world.getAllPlayers()) // Custom Java logic rewritten in JS
Essentially zipped containers holding Resource Packs (textures, sounds, models) and Behavior Packs (entity components, loot tables, animations, and JavaScript/TypeScript scripting). They rely on Bedrock's built-in data-driven engine. This is the most time-consuming part of the
To ensure your converted .mcaddon functions smoothly and passes validation checks:
JavaBE is a free Windows desktop application designed specifically to convert Java Edition mod content into Bedrock add‑on format. It offers impressive automation features: entity and model conversion with geometry cleanup, animation conversion and controller generation, texture, sound, particle, and language conversion, automatic manifest and UUID generation, and even a script bridge fallback for Java logic that can’t be mapped directly. JavaBE is and not every Java mod can be fully ported yet. Some convert well, others partially, and complex mods may fail entirely. Simple Changes (JSON) If the
MyConvertedAddon/ ├── behavior_pack/ │ ├── manifest.json │ ├── pack_icon.png │ ├── items/ │ ├── entities/ │ ├── scripts/ │ └── functions/ └── resource_pack/ ├── manifest.json ├── pack_icon.png ├── textures/ ├── models/ ├── sounds/ └── texts/
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Go to File > Export > Export Bedrock Geometry and save the file. Export the textures as standard .png files. Step 2: Creating the Resource Pack
The Resource Pack handles visual and audio elements. Create a root folder named MyMod_Resource_Pack and add the following structure: manifest.json (Defines the pack UUID, name, and version) textures/ blocks/ (Place block PNGs here) items/ (Place item PNGs here) models/