No Peaceful Despawn
No Peaceful Despawn stops hostile mobs from vanishing when a world is switched to Peaceful difficulty, so monsters that were already present remain in place.
What it does
Turning the difficulty to Peaceful normally removes hostile mobs and stops new ones from spawning, which can break iron farms, XP grinders and other mob-based setups. This mod keeps existing monsters in the world and adjusts related game rules so that Peaceful mode does not wipe them out, while spawning is still controlled by the game.
The mod is a server-side addition for Fabric. Only the server needs it, so players join without installing anything. It depends on Fabric API and works with the 1.21.8 release. Its custom license means the mod is not open source, though the source code and issue tracker are publicly available.
Key features
Keeps monsters on Peaceful
Hostile mobs stay in the world when the difficulty is changed to Peaceful, rather than being removed.
Gamerule adjustments
Game rules are tweaked so that switching to Peaceful no longer causes monsters to despawn.
Protects mob farms
Farms and grinders that depend on hostile mobs keep working after the difficulty is changed.
Spawner handling
Monster spawners and infested blocks are handled through the doPeacefulMobSpawners game rule.
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
Use cases
Keeping mob farms running
A survival world that relies on iron farms or XP grinders can change difficulty without losing its hostile mobs.
Who it’s for: Server owners and players who run survival worlds with mob farms, or who switch to Peaceful difficulty and want their existing monsters to stay.
How it compares
Practical Gamerules is a Fabric mod for 1.21.11 that is client and server and licensed as All rights reserved, so it applies to a different version and needs installing on both sides. No Nametag Peaceful Despawn is also a Fabric mod with a server-side only environment, covering 1.21 – 1.21.11 under All rights reserved, which makes it closer in environment but broader in version range.
| Mod | Loaders | Game versions | Environment | Updated |
|---|---|---|---|---|
| No Peaceful Despawn | Fabric | 1.21.8 | Server-side only | 2025-08-06 |
| Practical Gamerules | Fabric | 1.21.11 | Client and server | 2025-12-22 |
| No Nametag Peaceful Despawn | Fabric | 1.21 – 1.21.11 | Server-side only | 2026-01-08 |
Questions
Does No Peaceful Despawn require Fabric API?
Does the mod need to be installed on the client?
Which game version does the mod support?
In the catalog
No Peaceful Despawn is one of 29,952 Game mechanics mods on ModsFinder, and one of 19,630 Game mechanics mods for Fabric. 17,695 mods support Minecraft 1.21.8.
More from skycatminepokie
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What the author says
Have you ever switched difficulty to peaceful by mistake? If you have, then you know that suddenly ALL hostile mobs are gone! Iron farms are broken, your xp grinder is missing an endermite, and that one endermen that's been piling dirt around itself in a boat seems to have teleported away, and worst of all... that…
Official listing
- Modrinth page
- modrinth.com/mod/no-peaceful-despawn
- Owner
- skycatminepokie
- Published
- 2025-08-06
- Updated on Modrinth
- 2025-08-06
- Facts verified
- 2026-10-15