| Java .jar | Bedrock .mcaddon |
|-------------|--------------------|
| Java code (bytecode) | JSON + JavaScript (Script API) |
| Forge/Fabric API | Vanilla components + @minecraft/server |
| Direct world generation | Feature rules / structures |
| Single file | Two‑pack system (BP + RP) |
Bottom line: You cannot “convert” a JAR. You reverse‑engineer its features and rebuild them from scratch using Bedrock’s JSON components and scripts. Allow 10–200 hours depending on mod complexity.
To convert a Java .jar mod or Paper plugin into a Bedrock .mcaddon format, you can use specialized automation tools designed to bridge the gap between Java's C++ code and Bedrock's JSON/JavaScript-based system. Primary Conversion Tool: JavaBE
JavaBE is a toolkit from developer Stonebyte (formerly CodeNex) specifically designed to automate the porting of .jar mods into Bedrock-ready .mcaddon files.
Functionality: It handles automatic pack generation, file structure setup, and optimization for Bedrock Edition. convert jar to mcaddon work
Compatibility: Supports various Java loaders and allows porting for both mods and plugins.
Where to find: Detailed instructions and community support are primarily hosted on their official YouTube channel and Discord server. Alternative: Server-Side Bridging (GeyserMC)
If your goal is to make a Paper server plugin work for Bedrock players, you don't necessarily need to "convert" the file. Instead, use a protocol bridge:
GeyserMC: A Geyser - Paper Plugin that allows Bedrock Edition clients to join Java Edition servers. GameTest is not as powerful or universal as
Benefit: You keep your original Paper .jar plugins running on the server while Bedrock players connect and experience them in real-time. Manual File Conversion & Structure
If you are building an addon from scratch using Java assets, follow these standard packaging steps:
Since you cannot convert the file directly, you must reverse-engineer the JAR and rebuild it as an MCADDON. Here is how the professionals do it.
Once you have recreated the mod's assets and behavior, you need to pack it correctly. | Java
Add Manifest Files (Crucial!) Without these, Minecraft ignores your file.
Zip them together:
Install: Double-click the .mcaddon file. Minecraft Bedrock will launch and ask if you want to import it.
