NotTodayMod
NotTodayMod gives server owners and pack creators a way to block specific mobs or whole namespaces from spawning, and to adjust how often natural spawns occur.
What it does
Blocking works through a small server-side config. Exact mob IDs, wildcard matches and dimension-specific rules can each be set, so a rule can cover one mob, a mod's whole namespace, or only a single dimension. Natural spawn frequency can be raised or lowered with configurable weight multipliers, and changes apply at runtime, including to modded mobs, modded biomes and custom dimensions, without editing biome data or world generation.
Spawner handling is optional. When enabled, matching spawners are first swapped for an inert spawner and then removed safely during a later chunk load, which avoids the warnings that appear when block entities are removed too early during world generation. Spawn eggs matching the rules can also be removed from player inventories and the world. The mod runs on Forge and NeoForge, is server-side only, and is published for 1.20.1, 1.21.1, 1.21.11, 26.1.1 and 26.1.2 under All rights reserved, so it is not open source. Its first file came out on 2026-04-03 and the latest on 2026-04-25.
Key features
Entity blocking
Single creatures or whole mod namespaces can be kept from appearing in the world through natural spawning.
Spawn frequency weights
Natural spawn frequency can be increased or reduced per rule with configurable weight multipliers.
Baby variant control
An optional setting decides whether baby versions of blocked mobs are blocked too, for mobs that expose a baby and adult state.
Periodic statistics
Performance statistics are logged at intervals so administrators can see the effect of their rules.
Compatibility
Latest build for each game version and loader.
Only full game releases are shown. This mod publishes no snapshot builds.
How it compares
Stop Mob Spawn Hostile Only is a Forge and NeoForge option for 1.20.1 – 26.1.2 that runs on client and server, under All rights reserved and not open source. MobSpawnController covers Fabric, Forge and NeoForge for 1.20.1 – 1.21.1 and is server required with optional client, under All rights reserved. Entity Tweaks Configuration is server-side only, is open source under the MIT License, and covers 1.19.2 – 26.2 on Fabric, Forge and NeoForge.
| Mod | Loaders | Game versions | Environment | Updated |
|---|---|---|---|---|
| NotTodayMod | Forge and NeoForge | 1.20.1 – 26.1.2 | Server-side only | 2026-04-25 |
| Stop Mob Spawn Hostile Only | Forge and NeoForge | 1.20.1 – 26.1.2 | Client and server | 2026-08-21 |
| MobSpawnController | Fabric, Forge and NeoForge | 1.20.1 – 1.21.1 | Server required, client optional | 2026-10-03 |
| Entity Tweaks Configuration | Fabric, Forge and NeoForge | 1.19.2 – 26.2 | Server-side only | 2026-06-27 |
Questions
Does the server need NotTodayMod installed?
Can it block baby mobs along with adults?
Does a change need a restart?
Which loaders and versions does it support?
In the catalog
NotTodayMod is one of 11,058 Mobs mods on ModsFinder, and one of 6,527 Mobs mods for Forge. 15,189 mods support Minecraft 26.1.2.
More from M0stlyHarmless
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What the author says
Designed with simplicity and performance in mind, NotTodayMob provides configurable control over mob spawning without modifying world generation definitions or biome data. Individual mobs — or entire namespaces — can be blocked entirely, or have their natural spawn frequency increased or reduced using straightforward…
Official listing
- Modrinth page
- modrinth.com/mod/nottodaymod
- Owner
- M0stlyHarmless
- Published
- 2026-04-03
- Updated on Modrinth
- 2026-04-25
- Facts verified
- 2026-10-15