Converting a .jar file (typically a Java Edition mod) to an .mcaddon (Bedrock Edition) is a complex process because the two versions use entirely different programming languages—Java for the former and C++ with Bedrock-specific scripting for the latter. There is no single "one-click" tool that automatically rewrites code logic, but you can use a combination of free tools to automate the asset conversion. Recommended Free Tools for Conversion
Rename the resulting file from Archive.zip to YourModName.mcaddon . Ensure the file extension changes from .zip to .mcaddon . Step 6: Test Your Add-on
Because the codebases are fundamentally different languages, there is no magic "converter" button that works on every mod. A .jar mod modifies Java code; a Bedrock add-on modifies behavior and resource files. However, with the right tools and patience, converting simpler mods—such as new items, blocks, or mechanics—is possible for free. convert jar to mcaddon free
: Create a new folder for your MCAddon and add the necessary files and folders according to the MCAddon specification.
: Use this Online JAR to ZIP Converter to quickly change the format before manually restructuring the files into an addon. Converting a
A Java mod built for version 1.12.2 uses an entirely different data structure than modern Bedrock editions. Attempting to convert older mods requires massive data remapping. Conclusion
Create a folder for your add-on with subfolders for behavior pack and resource pack. Each pack requires a manifest.json file defining UUIDs, version, and dependencies. An .mcaddon file is essentially a ZIP file containing Behavior_Pack/ and Resource_Pack/ folders—rename .zip to .mcaddon after packing. Ensure the file extension changes from
Format it with the required Bedrock syntax, inputting your name, description, and the generated UUIDs. Step 4: Package into an .mcaddon File
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with a command like java -jar Thunder.jar nogui --input "C:\path\to\pack.zip" .