Heart Leveling

Heart Leveling — Java Edition

Inspired by the Mite Heart System

Level up your XP, level up your max HP. This datapack adds a progression system where your maximum hearts scale based on your experience level the more you grind, the tankier you get.

How it works:

You start with just 1 heart. Every 5 XP levels, your max health increases by 1 heart reaching the vanilla maximum of 10 hearts at level 45.

Progression:

Level 0 – 4 = 1 heart

Level 5 – 9 = 2 hearts

Level 10 – 14 = 3 hearts

Level 15 – 19 = 4 hearts

Level 20 – 24 = 5 hearts

Level 25 – 29 = 6 hearts

Level 30 – 34 = 7 hearts

Level 35 – 39 = 8 hearts

Level 40 – 44 = 9 hearts

Level 45+ = 10 hearts (max)

A note on MITE accuracy:

The original MITE mod starts players at 3 hearts and adds 1 heart every 5 levels. This datapack follows the same scaling but starts harder at 1 heart. Unlike the Bedrock edition of this pack which required a player.json + script workaround, the Java version uses the /attribute command directly on minecraft:max_health, making it clean, precise, and mod-friendly.

⚠️ Compatibility:

This datapack sets minecraft:max_health base value every tick. It will conflict with any mod or datapack that also directly modifies the player's base health - such as other health progression systems. Mods that add health via attribute modifiers (e.g. armor bonuses, RPG stat mods) are generally safe and will stack correctly on top.

Requirements: Minecraft Java Edition 1.21.9+, no mods required. Drop the .zip into your world's datapacks folder and play.

This datapack is designed to be modular — feel free to include it in your own modpack or datapack project. No permission needed, just credit the original creator.

Licensed under CC BY 4.0. Free to use, modify, and redistribute with credit.