Before you can convert anything, you need to see what’s inside the source file. Right-click your .jar file.

: Usually caused by a syntax error in the manifest.json . Use a JSON validator to check for missing commas or brackets.

: Check that your texture__list.json is updated and pointing to the right path.

: Refer to the original Java code (if available) to see variables like health, movement speed, or crafting recipes, and input them into the Bedrock component tags. Step 4: Packaging as .mcaddon

This is the most complex part of a "verified" conversion. You must manually recreate the mod's functionality using Bedrock's JSON components.

: Java mods often use .json or .java models. Use a tool like Blockbench to import the Java model and export it as a Bedrock Geometry file.

: Create a manifest.json for both your Resource and Behavior packs. Use a UUID generator to give each pack a unique ID.

While a full "auto-converter" doesn't exist for code, these tools are the industry standard for asset porting:

: Contain Java code and assets for Minecraft Java Edition .