Example of a basic custom item behavior ( custom_sword.json ):
Java mods often use Java-specific JSON or properties files for models. Bedrock requires Blockbench-compatible geometry models. Open (a free 3D modeling software). Go to File > Import and select the Java block/item model. Once imported, go to File > Convert Project .
Sound effects, music, and visual textures transfer over with minimal conversion friction. What Will Break (Requires Rewrite):
I can give you a more tailored guide for that specific type of conversion. convert jar to mcaddon work
"uuid": "bbbbbbbb-cccc-dddd-eeee-ffffffffffff", "version": [1, 0, 0]
as a compressed archive to access its visual and data assets. : You can change the file extension from or use an extraction tool to open it. What to look for : Inside the folder, you will find textures ( ), models (
file—filled with complex machinery and new dimensions. They want to bring this magic to their phone or console, which uses the Bedrock engine and prefers Example of a basic custom item behavior ( custom_sword
file for both your Resource and Behavior packs to define the addon's UUID and version. Zip the folders together. Rename the extension to
Place these scripts in the scripts folder of your Behavior Pack. Step E: Packaging as .mcaddon Create two folders: YourModName_BP and YourModName_RP .
Final advice: Don’t “convert” — . Take the soul of the JAR mod and build a native Bedrock add-on that feels right for the platform. Go to File > Import and select the Java block/item model
: These contain compiled Java bytecode. They actively modify the game's internal code at runtime using modding APIs like Forge, Fabric, or NeoForge. They can introduce entirely new game mechanics, complex logic, and deep engine overhauls.
Bedrock requires specific texture layouts and file naming conventions. Ensure your item and block textures are saved as transparent PNGs. Create a textures_list.json and item_texture.json to tell Bedrock where to look for these sprites. Phase 3: Building the Resource Pack
"type": "resources", "uuid": "22222222-3333-4444-5555-666666666666", "version": [1, 0, 0]
Java blocks and items utilize unique class inheritance, whereas Bedrock blocks and items rely on localized component structures (e.g., minecraft:block_light_filter ).
| Tool | Purpose | |------|---------| | | Experimental script that converts simple item/block JSON definitions. | | Blockbench | Model and animation creation for Bedrock. | | bridge. | Advanced add-on IDE with auto-completion. | | mcreator (Bedrock export) | Some Mcreator templates now support Bedrock export (limited). | | Manual JSON & JS | The real workhorse. |