Minecraft’s two main editions—Java Edition and Bedrock Edition—run on completely different codebases. Java mods (.jar files) cannot be directly converted to Bedrock add-ons (.mcaddon files) with a simple tool or renaming trick. However, with the right process, you can rebuild the mod’s functionality for Bedrock.
The short answer: No. There is no magic software that instantly rewrites Java bytecode into Bedrock's C++ addon format. convert jar to mcaddon work
Bedrock uses JSON component‑based definitions. From Java to Bedrock: How to Convert a
Once you have recreated the assets and behaviors in the Bedrock format, you must package them: manifest.json with the right process