You can convert a .jar to .mcaddon for free if you’re willing to learn Bedrock add-on development and manually rebuild the mod. There’s no magic tool, but the path is open to anyone with patience and curiosity.
: Ensure you have a manifest.json file inside (you may need to create one for Bedrock).
: Offers a free tool to instantly turn JAR files into ZIP files, which is the first step for manual porting.
Use a free online tool like Itsme64’s JAR to ZIP Converter or JAR Tools to extract the contents.
Which would you prefer: (A) a step-by-step guide for converting your own, original Java-based project into a Bedrock mcaddon, or (B) general guidance on creating a new Bedrock add-on from scratch that replicates features you need?