Chunkloadable Spawners
by GrizzleNL
Chunkloadable Spawners lets vanilla-style spawners keep working while their chunk is unloaded, so mob farms run without a player nearby.
What it does
Vanilla spawners stop when no player is within range, which interrupts automated mob farms. This mod changes that by letting a spawner remain active offline, so spawning continues while the area is kept loaded by a chunk loader. A spawner is only fully shut down when no player stands within 16 blocks of it, which keeps the behavior predictable.
The mod is a server-side only change, so players join without installing anything, and the server needs Forge or NeoForge with the mod present. Its checks are written to run efficiently, and it is meant for multiplayer servers and modpacks that already use chunk loaders such as FTB Chunks, Create or Mekanism. Files are published for Forge and NeoForge, both for 1.20.1, and the code is released under All rights reserved, so it is not open source.
Key features
Offline spawning
Spawners keep generating mobs while their chunk is loaded by a chunk loader but no player is nearby.
Upgraded spawner drops
Mining an upgraded spawner drops a Netherite Ingot on the ground, so the investment is not lost when it is removed.
Balanced upgrade mechanic
Spawners can be improved through a straightforward upgrade path, which adds a progression step that vanilla spawners lack.
Efficient checks
Activity checks are run with low overhead on the server, so the mod does not add heavy load on busy servers.
Compatibility
Latest build for each game version and loader.
Only full game releases are shown. This mod publishes no snapshot builds.
Use cases
Automated mob farms
Farms can keep grinding across the world while the player is away, without relying on a player staying nearby.
Who it’s for: Server owners and modpack builders who run automated mob farms and want spawners that continue working when players leave the area.
How it compares
Spawner Blocker is open source under the GNU Affero General Public License v3.0 only, runs as a client or server optional mod for Forge 1.20.1, and works as a blocker rather than an offline spawner. Iron Spawners is open source under the GNU General Public License v3.0 or later, requires client and server, and covers 1.20.1 – 1.20.4 on Forge.
| Mod | Loaders | Game versions | Environment | Updated |
|---|---|---|---|---|
| Chunkloadable Spawners | Forge and NeoForge | 1.20.1 | Server-side only | 2026-06-01 |
| Spawner Blocker | Forge | 1.20.1 | Client or server, optional | 2025-06-12 |
| Iron Spawners | Forge | 1.20.1 – 1.20.4 | Client and server | 2024-01-22 |
Questions
Does Chunkloadable Spawners need to be installed on clients?
Which loaders does Chunkloadable Spawners support?
Does it work with chunk loaders from other mods?
In the catalog
Chunkloadable Spawners is one of 11,058 Mobs mods on ModsFinder, and one of 6,527 Mobs mods for Forge. 34,764 mods support Minecraft 1.20.1.
More from GrizzleNL
Similar mods
What the author says
Vanilla spawners have a frustrating limitation for automation: they completely shut down unless a player is standing within 16 blocks. If you want to leave your base or work on a project across the world, your automated mob farms grind to a halt—even if you have a chunk loader keeping the area active. This mod fixes…
Official listing
- Modrinth page
- modrinth.com/mod/chunkloadable-spawners
- Owner
- GrizzleNL
- Published
- 2026-06-01
- Updated on Modrinth
- 2026-06-01
- Facts verified
- 2026-10-15