Spawner Capacity
by Luc1fer1o
Spawner Capacity makes mob spawners finite, so each spawner stops producing mobs after a set number of successful spawns.
What it does
Each mob spawner keeps its own count of successful spawns. Once the count reaches the limit, the spawner clears its stored entity data and no longer shows a mob, but the spawner block stays in the world as an empty spawner. Failed spawn attempts do not count toward the limit, so only successful spawns use up capacity.
The default limit is 10 successful spawns per spawner. Server owners can change it with the maxSpawns value, which is written to spawnercapacity-server.toml when the server config is generated. A higher value gives each spawner a longer life, while a lower one exhausts them sooner. The change reaches spawners placed after it, and spawners already in use keep their tracked count.
Spawner Capacity is a NeoForge mod for 1.21.1. It runs on client and server, so both the server and every player need it, and it is released under All rights reserved, which means it is not open source.
Key features
Finite spawners
A mob spawner stops producing mobs after a configurable number of successful spawns.
Per-spawner tracking
The count is kept for each individual spawner, so one spawner running out does not affect the others.
Empty spawner remains
When the limit is reached, the spawner block stays behind empty, and only its entity data is cleared.
Configurable limit
Server owners set the number of spawns with the maxSpawns value in the generated server config file.
Gallery
Compatibility
Latest build for each game version and loader.
Only full game releases are shown. This mod publishes no snapshot builds.
Use cases
Who it’s for: Server owners who want mob farms and spawners to run out over time, rather than producing mobs without end.
How it compares
Kinda Limited Spawners is a NeoForge mod for 1.21.1 that is open source under the GNU General Public License v3.0 or later, and it runs on client and server like Spawner Capacity. LimitedSpawners is open source under the MIT License, covers 1.19 – 1.20.2 and loads on Fabric, Forge and NeoForge.
| Mod | Loaders | Game versions | Environment | Updated |
|---|---|---|---|---|
| Spawner Capacity | NeoForge | 1.21.1 | Client and server | 2026-07-03 |
| Kinda Limited Spawners | NeoForge | 1.21.1 | Client and server | 2026-03-10 |
| LimitedSpawners | Fabric, Forge and NeoForge | 1.19 – 1.20.2 | Client and server | 2023-11-26 |
Questions
Does Spawner Capacity need to be installed on both sides?
What happens to a spawner once its limit is reached?
Are failed spawn attempts counted toward the limit?
Where is the spawn limit set?
More from Luc1fer1o
What the author says
Spawner Capacity makes mob spawners finite. After a spawner successfully creates a configurable number of mobs, the spawned entity is removed from that spawner and the block remains behind as an empty spawner. The server config is generated as spawnercapacity-server.toml.
Official listing
- Modrinth page
- modrinth.com/mod/spawner-capacity
- Owner
- Luc1fer1o
- Published
- 2026-07-02
- Updated on Modrinth
- 2026-07-03
- Facts verified
- 2026-10-15