
Modrinth · Minecraft mod
HitboxChanger
A fork of Walksy's Custom Hitboxes. Adds new configurable hitbox features.
Quick answer
Which HitboxChanger release should I use?
HitboxChanger 1.0.0-1.21.4 targets 1.21.4 with Fabric. It must be installed on the client. Do not install it on the dedicated server. All 2 required mods have matching files.
Where it goes
Is HitboxChanger required on the client, server, or both?
It must be installed on the client. Do not install it on the dedicated server.
This file is marked client-only.
What else does HitboxChanger 1.0.0-1.21.4 need?
1.0.0-1.21.4. Change the file and its required mods may change too.
Install Fabric API, WalksyLib first. We found matching files for this game-version and loader setup. 2 come through another mod in the chain.
2 extra mods were pulled in by other dependencies. Indented rows show who needs each one. We only count dependency files that match this setup. A file for another loader does not fill the gap.
Before you install it
Add HitboxChanger without breaking your instance.
Built for HitboxChanger 1.0.0-1.21.4. Pick another file and the loader, install side or required mods may change.
- 01
Stick to this file
Use 1.0.0-1.21.4. It targets 1.21.4 with Fabric; another release may have different loader, side or dependency requirements.
- 02
Bring the mods it needs
Install Fabric API, WalksyLib first. We found matching files for this game-version and loader setup. 2 come through another mod in the chain.
- 03
Put it on the correct side
It must be installed on the client. Do not install it on the dedicated server.
- 04
Pick the file you checked
Use the “Get this file” button beside 1.0.0-1.21.4. It opens that exact file at the source.
About this project
What does HitboxChanger add?
This project is a fork of CustomHitbox.
What's changed in this fork:
Fixed minor bugs and removed team-related options.
Added custom highlight when blocking with a shield.
Added separate colors for the front and back halves of the hitbox, with an optional divider.
And much more!
Overview & Features:
Separate profiles are available for players, arrows, Wind Charges, Ender Pearls, dropped items, End Crystals, item frames, potions, Bottles o' Enchanting, experience orbs, hostile mobs, passive mobs, and other entities.
Global toggle to enable or disable the mod.
Auto-enable hitbox rendering on game launch.
Individual visibility toggles for each entity type.
Outline customization: color, thickness, gradient, highlight on taking damage, highlight when within interaction range, and highlight on crosshair hover.
Fill customization: color, gradient, highlight on taking damage, highlight when within interaction range, and highlight on crosshair hover.
Look vector with adjustable length, width, color, and directional arrow.
Eye-level box for living entities.
Auto-hide hitboxes near the camera with smooth fading.
For players: option to show hitboxes only when flying with Elytra.
For players: option to hide your own hitbox.
Requirements:
This is a client-side mod. It requires Fabric API and WalksyLib.
Project description from Modrinth.
Pick your setup
HitboxChanger by Minecraft version and loader
Choose the version and loader you play, then open the matching release.
1.21.11
1 loader build1.21.10
1 loader build1.21.4
1 loader buildCheck the dependencies, then try the file in a copied instance before changing a world you care about.
Recent files
HitboxChanger versions and loaders
1.0.0-1.21.4
HitboxChanger-1.0.0-1.21.4.jar
6 Aug 2026
1.0.0-1.21.10
HitboxChanger-1.0.0-1.21.10.jar
6 Aug 2026
1.0.1-1.21.11
HitboxChanger-1.0.0-1.21.11.jar
25 Jul 2026
1.0.0-1.21.11
HitboxChanger-1.0.0-1.21.11.jar
28 Jun 2026
Looking for an older file? The official Modrinth project page is in Resources.