BossBarScale

Resize the boss bar with an easy in-game slider.

357 Downloads

fabricutility

Rent Server with this Mod

Screenshots

About this Mod

BossBarScale

This is a Fabric mod that allows players to scale boss bars without changing the GUI scale. Customize the size of boss bars to your liking without affecting other UI elements.

Installation

Download the JAR from Modrinth and install the dependencies.

Dependencies

Usage

Make sure all dependencies are installed.
Open the config screen via ModMenu (skip for default, x0.75).
Adjust the boss bar scale settings to your preference (skip for default, x0.75).
Press Save Changes and then Done to apply the settings (skip for default, x0.75).
Enjoy your customized boss bar sizes!

If you encounter any issues, message me on Discord @escyth.

Available Versions

BossBarScale 0.3release

MC 1.21.8fabric

September 27, 2025

BossBarScale 0.2release

MC 1.21.8fabric

August 18, 2025

BossBarScale 0.1release

MC 1.21.8fabric

August 18, 2025

How to Install BossBarScale on Your Server

Order Server

Order a Minecraft Java server with at least 3 GB RAM (4 GB recommended).

Set fabric Loader

In the panel under "Egg", select the fabric loader and matching Minecraft version (1.21.8).

Install Mod

Open the mod browser in the dashboard and search for "BossBarScale". Click "Install" – done! Alternatively, upload the .jar via SFTP to the /mods folder.

Compatibility

Mod Loaders

fabric

Minecraft Versions

1.21.8

Server-side

✗ Unsupported

Recommended RAM

4 GB(min. 3 GB)

Frequently Asked Questions

BossBarScale server crashes on startup – what to do?

Most common cause: wrong fabric version or insufficient RAM. Check the server log (latest.log) for "OutOfMemoryError" or "Mixin" errors. With Mado Hosting: ensure at least 3 GB RAM is allocated and the loader matches the mod version (1.21.8). You can switch loaders with one click in the panel.

Is BossBarScale compatible with fabric?

BossBarScale officially supports fabric for Minecraft 1.21.8. The Mado dashboard automatically detects incompatible loader combinations.

Server lagging with BossBarScale – how to optimize performance?

Recommended RAM: 4 GB (per 8 players). Use /spark profiler to check if BossBarScale consumes the most tick time. Common fixes: reduce server view-distance to 8-10, install "performant" or "starlight" as supplementary mods on Forge. With Mado Hosting, your server runs on NVMe SSDs with dedicated CPU cores for minimal latency.