Boss Tweaks
by x7bbbbbbb
Boss Tweaks changes how bosses in Fabric worlds are healed, shown and armored, and runs on a server alone without requiring any change on the player side.
What it does
Boss Tweaks heals bosses that nearby players have defeated, and it can attach configurable bossbars to entities that lack one, including vanilla and modded bosses. The search radius, the alive-player check and the distance at which a bossbar is visible are all set in the config. Until a boss has lost at least one point of health, its bossbar can stay out of sight; seven colors are available for the bar: purple, red, white, yellow, blue, green and pink.
The mod also applies armor scaling and some balancing changes that suit multiplayer servers. Which entities receive the tweak is decided by four dedicated tags located under the boss regen entity type tags, and the default selection covers the c:bosses tag. Configuration can be done through a datapack, enabled by default in new worlds, or through the Global Packs setup. Boss Tweaks requires Fabric API on Fabric 1.21.1, and it is open source under the MIT License.
Key features
Boss healing
Bosses regenerate health while players near them have defeated a boss, with the radius set in the config.
Configurable bossbars
Bosses without a bossbar can receive one, and the color, visibility distance and hidden-until-damaged state are all adjustable.
Armor scaling
Armor on affected bosses scales with the tweaks, adding some balancing to fights on busy servers.
Entity tags
Four dedicated tags pick the entities the tweak applies to, so a server can extend or narrow the set.
Compatibility
Latest build for each game version and loader.
Only full game releases are shown. This mod publishes no snapshot builds.
Requirements
Dependencies declared by the latest file for each loader.
Required 1
Optional 2
Use cases
Multiplayer balancing
Server owners can tune boss fights for groups of players without editing each boss mod separately.
Modded bosses
Bossbars can be added to modded bosses that do not show one in vanilla.
Who it’s for: Server owners who run Fabric 1.21.1 and want to adjust boss healing, bossbars and armor without changing the client.
How it compares
Boss Tweaks is server-side only, open source under the MIT License and published for Fabric 1.21.1. Bossbar Tweaks is client-side only, open source under the GNU General Public License v3.0 or later and published for Fabric 1.21.9 – 26.2, so it only changes what players see. Warden Bossbar is server required with client optional, under the GNU Lesser General Public License v3.0 or later, and covers 1.20.3 – 1.20.6 on Fabric, Forge, NeoForge and Quilt.
| Mod | Loaders | Game versions | Environment | Updated |
|---|---|---|---|---|
| Boss Tweaks | Fabric | 1.21.1 | Server-side only | 2026-10-14 |
| Bossbar Tweaks | Fabric | 1.21.9 – 26.2 | Client-side only | 2026-05-24 |
| Warden Bossbar | Fabric, Forge, NeoForge and Quilt | 1.20.3 – 1.20.6 | Server required, client optional | 2024-12-25 |
Questions
Does Boss Tweaks need Fabric API?
Do players need to install Boss Tweaks?
Can Boss Tweaks work with loot chests?
In the catalog
Boss Tweaks is one of 11,058 Mobs mods on ModsFinder, and one of 5,189 Mobs mods for Fabric. 32,366 mods support Minecraft 1.21.1.
More from x7bbbbbbb
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What the author says
A mod that heals Bosses when players are defeated, adds configurable bossbars for any entity (vanilla or modded) and adds some balancing changes for multiplayer servers. Lootr: Boss Loot Chest is compatible with lootr.
Official listing
- Modrinth page
- modrinth.com/mod/boss-tweaks
- Owner
- x7bbbbbbb
- Published
- 2026-06-18
- Updated on Modrinth
- 2026-10-14
- Facts verified
- 2026-10-15