Let There Be Portal Farms!
by seviq25
Let There Be Portal Farms! keeps mobs from despawning after they step through a nether portal, so a farm built around portal travel keeps its mobs.
What it does
Mobs that pass through a portal into another dimension normally despawn right away when no player is near them on the other side, which breaks many portal-based farms, especially on multiplayer servers where players must stay logged in beside the farm. This mod gives whitelisted mobs a grace period after they change dimensions, during which they cannot despawn. Once that period passes, the default despawn logic takes over again.
Entities that are already persistent, for example tamed animals or mobs with a name tag, are left alone so their persistence is not removed. The entity whitelist and the length of the grace period are both set in the config. The option persistenceDurationSeconds sets the grace period in seconds, with a default of 60. Reloading the config requires the portalfix.reload permission.
The mod is open source under the MIT License and runs on the server only. It requires Fabric API and publishes files for 26.2 and 26.3, with 1.0.1 for 26.3 as the latest release, dated 2026-09-28.
Key features
Dimension-change grace period
A whitelisted mob that enters a portal receives a timed immunity from despawning.
Configurable duration
The persistenceDurationSeconds option sets how long the grace period lasts, with 60 seconds as the default.
Entity whitelist
Only the entities on the whitelist get despawn immunity, so other mobs keep the vanilla behavior.
Persistent mobs left alone
Mobs already persistent through taming or a name tag keep their persistence and are not changed.
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
Who it’s for: Server owners and players who run mob farms that use nether portal travel. Players on a server must still run Fabric API and the mod must be installed on the server.
How it compares
Portalfarm Fix is server-side only and open source under the MIT License, with files for 26.1.2 – 26.2. Portal Anchor is also server-side only and open source under the MIT License, but it has files only for 26.1.2. Simple Hostile Despawn is server-side only, covers 26.1.1 – 26.1.2, and is not open source, as it is under All rights reserved.
| Mod | Loaders | Game versions | Environment | Updated |
|---|---|---|---|---|
| Let There Be Portal Farms! | Fabric | 26.2 – 26.3 | Server-side only | 2026-09-28 |
| Portalfarm Fix | Fabric | 26.1.2 – 26.2 | Server-side only | 2026-06-30 |
| Portal Anchor | Fabric | 26.1.2 | Server-side only | 2026-05-24 |
| Simple Hostile Despawn | Fabric | 26.1.1 – 26.1.2 | Server-side only | 2026-04-05 |
Questions
Does Let There Be Portal Farms! require another mod?
Do players need to install this mod?
Who can reload the config?
Which versions are supported?
In the catalog
Let There Be Portal Farms! is one of 11,058 Mobs mods on ModsFinder, and one of 5,189 Mobs mods for Fabric. 8,071 mods support Minecraft 26.3.
Similar mods
What the author says
A Fabric server-side mod for Minecraft 26.2+ for solving a common farming inconvenience - mobs despawning upon entering a nether portal, if no other players are nearby. Drop the mod.jar into your mods folder, and start the server!
Official listing
- Modrinth page
- modrinth.com/mod/let-there-be-portal-farms
- Owner
- seviq25
- Published
- 2026-07-18
- Updated on Modrinth
- 2026-09-28
- Facts verified
- 2026-10-15