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Upgradeable Spawners

by Pepsied

Upgradeable Spawners lets a player fit upgrade items into item frames placed around a spawner to change how it behaves.

FabricForgeNeoForgeQuiltServer required, client optionalMIT License1.21 – 1.21.11

What it does

Each upgrade is an item placed inside an item frame next to a spawner, and the upgrade is consumed when the frame is filled. Available upgrades change the entity spawn count, the maximum spawn delay, the activation range and the spawn range, and a single upgrade can disable the AI of spawned entities. Placing a redstone torch inside an item frame next to a spawner disables it, and removing the torch lets it resume.

The mod is a server mod that is published for Fabric, Forge, NeoForge and Quilt, with files for 1.21 – 1.21.11 in 12 release versions. Only the server needs it; a client may install it, but players join without it. It is released under the MIT License and is not open source. Data pack support is listed as a separate platform, so it can run on servers that use data packs rather than mod loaders.

Key features

  1. Item frame upgrades

    Upgrades are placed in item frames next to a spawner, and the frame is emptied when an upgrade is applied.

  2. Spawn count and delay

    One upgrade raises the entity spawn count, and another shortens the maximum spawn delay by 10 seconds.

  3. Activation and spawn range

    Upgrades widen the spawner activation range by 80 blocks or narrow the spawn range by 1 block for smaller farms.

  4. Disable spawned AI

    A single upgrade disables the AI of mobs that the spawner produces.

Compatibility

Latest build for each game version and loader.

1.21.x12 of 12 versions with builds
1.21.111.0.0+mod1.0.0+mod1.0.0+mod1.0.0+mod
1.21.101.0.0+mod1.0.0+mod1.0.0+mod1.0.0+mod
1.21.91.0.0+mod1.0.0+mod1.0.0+mod1.0.0+mod
1.21.81.0.0+mod1.0.0+mod1.0.0+mod1.0.0+mod
1.21.71.0.0+mod1.0.0+mod1.0.0+mod1.0.0+mod
1.21.61.0.0+mod1.0.0+mod1.0.0+mod1.0.0+mod
1.21.51.0.0+mod1.0.0+mod1.0.0+mod1.0.0+mod
1.21.41.0.0+mod1.0.0+mod1.0.0+mod1.0.0+mod
1.21.31.0.0+mod1.0.0+mod1.0.0+mod1.0.0+mod
1.21.21.0.0+mod1.0.0+mod1.0.0+mod1.0.0+mod
1.21.11.0.0+mod1.0.0+mod1.0.0+mod1.0.0+mod
1.211.0.0+mod1.0.0+mod1.0.0+mod1.0.0+mod
ReleaseBetaAlphaNot available

Only full game releases are shown. This mod publishes no snapshot builds.

How it compares

Full comparison

Monster Spawner Upgrades is server required with client optional under the MIT License, with a file for 1.21.4. Silk Touch Spawners covers 1.21 – 1.21.10 under All rights reserved and uses the same server and client sides. Force-Load Spawners! is server-side only and open source under the GNU Lesser General Public License v3.0 or later, with a file for 1.21.4.

ModLoadersGame versionsEnvironmentUpdated
Upgradeable SpawnersFabric, Forge, NeoForge and Quilt1.21 – 1.21.11Server required, client optional2026-02-26
Monster Spawner UpgradesFabric, Forge, NeoForge and Quilt1.21.4Server required, client optional2024-12-18
Silk Touch SpawnersFabric, Forge, NeoForge and Quilt1.21 – 1.21.10Server required, client optional2025-11-14
Force-Load Spawners!Fabric, Forge and NeoForge1.21.4Server-side only2025-03-24

Questions

Does Upgradeable Spawners need to be installed on the client?

No. It is required on the server and optional for players.

Which loaders does Upgradeable Spawners support?

Fabric, Forge, NeoForge and Quilt all have files, and the latest file for each is 1.0.0+mod for 1.21.11.

Is the upgrade item lost when applied?

Yes. The upgrade item is consumed when it is placed in an item frame next to a spawner.

In the catalog

Upgradeable Spawners is one of 8,499 Technology mods on ModsFinder, and one of 4,201 Technology mods for Fabric. 19,862 mods support Minecraft 1.21.11.

Technology mods8,499Fabric modsMods for 1.21.1119,862

More from Pepsied

All projects
Potted Farms1.21 – 26.2Mining Quarries1.21 – 26.2Auto Harvest1.20.3 – 26.2Early Elytra1.21 – 26.2More Professions1.21 – 26.2Item Glow1.21 – 26.2

Similar mods

Create1.18.2 – 1.21.1Quark1.9.4 – 1.21.1GraveStone Mod1.19 – 26.3Create Big Cannons1.18.2 – 1.21.1GD656Killicon1.18.2 – 1.21.4Create: Connected1.18.2 – 1.21.1

What the author says

Upgrade your spawners by placing an item frame anywhere on a spawner and placing the upgrade item into that frame. The upgrade item then gets consumed, emptying the item frame. Available upgrades: - Eye of Ender: Entity spawn count (4 Upgrades. Up to 8 entities) - Heart of the Sea: Decrease maximum spawn delay (4…
Pepsied, on the Modrinth page

Official listing

Owner
Pepsied
Published
2026-02-26
Updated on Modrinth
2026-02-26
Facts verified
2026-10-15

Tags

Game mechanicsMobsTechnology
Open on ModrinthCompare