Run the script via your portable command prompt, targeting your extracted JAR file.
Every Bedrock add-on requires a manifest.json file for both the Resource Pack and the Behavior Pack. This file tells Minecraft what the pack is, its version, and how it links to other packs.
Select both the [Your_Mod_BP] and [Your_Mod_RP] folders simultaneously.
Some Java mods change the game's core engine code. These cannot be converted into an Add-on; they require a "Script API" approach which is significantly more advanced. Pro-Tip: Use AI for JSON Translation how to convert jar to mcaddon portable
JavaBE is a free Windows desktop tool that automates the hardest parts of porting:
Create a matching folder for your behavior pack. Inside its root, create another manifest.json :
Before beginning, it helps to understand what these two file extensions actually do: Run the script via your portable command prompt,
Export as a Bedrock Geo file ( .geo.json ) for models and a PNG for textures.
Java mods use Java code for logic. Bedrock uses JSON. You must replicate the item/entity functionality using Bedrock Component Groups.
"format_version": 2, "header": "description": "Ported Java Mod Behavior", "name": "Portable Java Mod BP", "uuid": "GENERATE_UUID_1_HERE", "version": [1, 0, 0], "min_engine_version": [1, 20, 0] , "modules": [ "description": "Behavior Module", "type": "data", "uuid": "GENERATE_UUID_2_HERE", "version": [1, 0, 0] ] Use code with caution. Step 4: Automating with Online and Portable Converters Pro-Tip: Use AI for JSON Translation JavaBE is
: This is the most popular "portable" method. Open Blockbench (available on web, mobile, and PC). Import your Java .json or .jpm model. Convert it to a "Bedrock Model." Adjust pivot points and export as a Bedrock geometry file.
That is a .mcaddon file. That’s an emulator. And it runs at 5 FPS on most phones.