LootPregenerator

When a chunk generates, the mod works out the contents of its loot containers in the background instead of on the first open. Each result follows the same variables vanilla uses: the world seed, the loot table key and the loot table seed. Because the work is asynchronous, the server keeps running while the containers are prepared. The mod's stated purpose is to cut the delay players face when they open chests that generate far from them, such as ones holding maps or structure loot.

The mod is server-side only, so only the server needs it and players join without installing anything. It requires Fabric API and runs on Fabric for 1.21.1 – 1.21.11, with files for 11 release versions and v1.0.0 for 1.21.11 as the latest file, published on 2026-09-08. The code is not open source; it is released under All rights reserved.

A configuration file exposes many options, and an optional dashboard reports metrics and controls depending on the setup. The author notes that loot generation adds load on some servers, so the settings are worth checking against the server's performance. Reverting to the defaults is possible by removing the config file and then restarting. The mod is compatible with other mods that use vanilla loot table generation, such as Deeper & Darker. The author plans to keep the mod maintained on Fabric and has not given a timeline for Forge.