If you are searching for a website where you upload a .jar and download a .mcaddon —stop looking. It does not exist because the code languages are not compatible.
Search for "Bedrock equivalent of [Mod Name]" before attempting a manual port. The community has likely already built an MCADDON that does what your JAR does. convert jar to mcaddon work
"format_version": "1.20.0", "minecraft:item": "components": "minecraft:on_hit": "fire": "duration": 5 If you are searching for a website where you upload a
| Java Feature | Can it be converted to MCADDON? | Effort Level | | :--- | :--- | :--- | | New Blocks/Items (Basic) | (JSON definitions) | Medium | | New Entities/Mobs | Yes (Entity JSON & Geometry) | High | | GUI Menus (Chests, Inventories) | Partial (Requires scripting/HUD) | Very High | | World Generation (New Ores/Trees) | Yes (Feature Rules) | Medium | | New Biomes | Yes (Limited to Bedrock's biome logic) | Medium | | Rendering Engine changes (Shaders/Optifine) | No (Bedrock has RTX, not Java shaders) | Impossible | | Complex Machine Logic (Tech mods like IC2) | Partial (Requires huge JavaScript rewrite) | Extreme | | Core Game Mechanic changes (e.g., Combat overhaul) | No | Impossible | The community has likely already built an MCADDON
Here is the hard truth you need to accept before reading further: