How do I install Glass Heart?

Install the matching mod loader (Forge, Fabric or NeoForge) for your Minecraft version. Download the .jar. Put it in the .minecraft/mods folder and launch that loader profile. Opens on Modrinth — not every file is mirrored on our own servers.

What Minecraft version does Glass Heart work with?

The listing gives Minecraft 1.21, 1.21.1. This is the version stated by the author or source site, not something we verified ourselves.

Home›Java›Mods›Glass Heart

ModsJava

Glass Heart

by WillStuff · on Modrinth

Which build do you need?

This mod ships a separate file for every mod loader and every version of the game. Pick both, then download — the wrong build installs fine and then does nothing in the game.

Mod loader

Mod loader NeoForge1 build
Mod loader Forge1 build

Minecraft version

Minecraft 1.21–1.21.1Newest

Minecraft 1.20.1Newest

⬇ Download for 1.21–1.21.1 · NeoForge ⬇ Download for 1.20.1 · Forge

I don't know my version or loader

Open the Minecraft launcher and look at the profile you play on — it names both, like fabric-loader-1.21.4. The version also shows in the bottom-right corner of the game's main menu.

No loader in the profile name? Then it's plain Minecraft, and these mods won't run — you need Fabric or NeoForge installed first.

Open in MC Java Mods Get it on Google Play →

A difficult mod that sets max health to 1 heart. Everything is much riskier, and any damage could be fatal... Good luck.

The name and concept of this mod is inspired by the Hollow Knight mod by a similar name

READ BEFORE USE

Version 1.20.1 is FORGE, and will be the only forge version, so don't bother asking for an update.

1.20.1 requires the mod to be CLIENT and SERVER, whereas all the other ones only need to be on the SERVER

Health can be configured, for those of you who find it too hard

Setting it to 0 or less will set it to 1

To change max health, execute one of the following commands:

Singleplayer, Cheats disabled:

/setmaxhpsingleplayer <value>

BE WARNED! In a LAN world, people without cheats will still be able to toggle this value.

Anywhere, Cheats enabled:

/setmaxhp <value>

A Fabric, Paper, Datapack, and Spigot version are planned to release, but for now don't exist

Other Site versions:

I would personally recommend Modrinth, as it is easier to use, but this mod is still available on Curseforge.

CurseForge Version

https://www.curseforge.com/minecraft/mc-mods/glass-heart

THE CURSEFORGE VERSION WAS CODED DIFFERENTLY, AND THEREFORE WILL NOT WORK THE SAME WAY! SPECIFICLALLY, IT IS NEEDED CLIENT AND SERVERSIDE

Modrinth Version You're already here, but here's the link anyway:

https://modrinth.com/mod/glass-heart

Credits

Developer of Glass Soul (Concept and Name)

Developer of MCreator (1.20.1 version, and help with Coding Concepts)

Quick facts

Edition: Minecraft Java
File type: .jar
Minecraft versions listed: 1.21, 1.21.1
How to install: Install the matching mod loader (Forge, Fabric or NeoForge) for your Minecraft version. → Download the .jar. → Put it in the .minecraft/mods folder and launch that loader profile.
Where to get it: Opens on Modrinth — not every file is mirrored on our own servers.

Install steps are the general flow for this file type — How to install Minecraft Java mods & modpacks walks through it step by step.

Verified by MCModsHub

Ships as glass_heart-1.0.0.jar — drop this file into the mods folder
Download size: 17 KB
Download link checked 9 Sept 2026 — working

These come from our own check of the pack file, not from the source page.

Explore more

All Mods for Java All Minecraft Java mods Java mods for 1.21