Bossbar

Bossbar

Create health bars for bosses or entities: easy, performance-friendly, feature-rich.

by
13.6K Downloads
fabricadventureequipmentmobs
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Screenshots

Elder Guardian Bossbar

About this Mod

Bossbar

Enhancing Minecraft's bossbar functionality by properly extending it to entities. No more complicated command block setup, lag-inducing detection logic, and cheap attempts at recreating the real deal. This is the real deal now.

✅ Features

  • Entity bossbars take the name, health and max health of its entity.
  • Range can be specified for entity bossbars, meaning it's only visible to local players.
  • Default bossbars can be configured (see Configuration)
  • Thicken fog & darken skies with the extended functionality given to entity bossbars.
  • Server-side, meaning clients don't need to download it to connect.
  • Easy to use with the /bossbar command, swap out a bossbar id with a target selector, and done!
  • Optimized to a lagless extend, compared to Minecraft's bulky command code.

⚙️ Configuration

Configuration can be found in config\bossbar.json.

  • default:
    • <entity_type>: resource_location

      Set the entity bossbar's range. Defaults to 64. Any player outside of this range won't see the entity bossbar.

      Set if entity bossbar darkens the sky. Defaults to false.

      • thicken_fog: bool\

      Set if entity bossbar thickens the fog. Defaults to false.

      • color: (blue|green|pink|purple|red|white|yellow)\

      Set the entity bossbar's bar color. Defaults to purple.

      • style: (notched_6|notched_10|notched_12|notched_20|progress)\

      Set the entity bossbar's visual amount of segments. Defaults to progress.

  • register_before_vanilla: bool\

Register the command extension before vanilla, attempting to parse the bossbar argument as an entity before a server bossbar id. Defaults to false.

📖 Syntax

  • bossbar set <target> (visible|range|darken_sky|thicken_fog|color|style)
    • ... visible <visible>\

    Set the entity bossbar's visibility. Defaults to false for every entity, disabling their bossbar.

    • ... range <range>\

    Set the entity bossbar's range. Defaults to 64. Any player outside of this range won't see the entity bossbar.

    • ... darken_sky <darken_sky>\

    Set if entity bossbar darkens the sky. Defaults to false.

    • ... thicken_fog <thicken_fog>\

    Set if entity bossbar thickens the fog. Defaults to false.

    • ... color (blue|green|pink|purple|red|white|yellow)\

    Set the entity bossbar's bar color. Defaults to purple.

    • ... style (notched_6|notched_10|notched_12|notched_20|progress)\

    Set the entity bossbar's visual amount of segments. Defaults to progress.

📦 Arguments

  • <target>: entity
    • Specifies the entity whose bossbar is to change.
      Must be a player name, a target selector or a UUID.
  • <visible>: bool
    • Specifies the bossbar's visibility.
      Must be either true or false.
  • <range>: integer
    • Specifies the bossbar's range.
      Must be a 32-bit integer number between 0 and 2147483647 (inclusive).
  • <darken_sky>: bool
    • Specifies if the bossbar darkens the sky.
      Must be either true or false.
  • <thicken_fog>: bool
    • Specifies if the bossbar thickens the fog.
      Must be either true or false.

Available Versions

Bossbar 1.3+26.1.2release
MC 26.1.2fabric
April 24, 2026
Bossbar 1.2release
MC 1.21.9, 1.21.10, 1.21.11fabric
September 30, 2025
Bossbar 1.2release
MC 1.21.6, 1.21.7, 1.21.8fabric
June 18, 2025
Bossbar 1.2release
MC 1.21.5fabric
March 25, 2025
[1.21.x] Bossbar 1.2release
MC 1.21, 1.21.1, 1.21.2, 1.21.3, 1.21.4fabric
July 14, 2024

How to Install Bossbar on Your Server

1

Order Server

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

2

Set fabric Loader

In the panel under "Egg", select the fabric loader and matching Minecraft version (26.1.2).

3

Install Mod

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

Compatibility

Mod Loaders

fabric

Minecraft Versions

26.1.2, 1.21.11, 1.21.10 (+13 more)

Server-side

Required

Recommended RAM

4 GB(min. 3 GB)

Frequently Asked Questions

Bossbar 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 (26.1.2). You can switch loaders with one click in the panel.

Is Bossbar compatible with fabric?

Bossbar officially supports fabric for Minecraft 26.1.2, 1.21.11, 1.21.10. The Mado dashboard automatically detects incompatible loader combinations.

Server lagging with Bossbar – how to optimize performance?

Recommended RAM: 4 GB (per 8 players). Use /spark profiler to check if Bossbar 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.

Rent Modded Server

Install Bossbar with just one click on your server.

Recommended RAM
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Min. 3 GB | +1 GB pro 8 Spieler
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Details

License
LicenseRef-All-Rights-Reserved
Server-side
Required

Supported Versions

26.1.21.21.111.21.101.21.91.21.81.21.71.21.61.21.51.21.41.21.3+6 more