Chunky Pregenerator
by nonprofit
Chunky Pregenerator is a Fabric mod that pre-generates chunks in an expanding spiral centered on each player's actual position, using Chunky.
What it does
Chunky Pregenerator starts a new generation bundle whenever a player moves beyond a deadzone distance from the last generation center, so terrain ahead of the player is generated first. The spiral is split into concentric rings shaped by a quadratic ease-in curve, with ring spacing tighter near the player and wider further out. Chunky skips chunks that already exist, so overlapping rings cost little.
The mod runs in the background and survives restarts. Its ring index and center are saved to disk, so a quit mid-spiral resumes at the same ring after rejoining. If server TPS drops during generation, Chunky is told to pause and resumes once performance recovers. The mod works in singleplayer and on dedicated servers. It requires Chunky and Fabric API, and it is licensed under the MIT License and is open source. Its files target 1.21.11 only, with 2.2.0 as the latest Fabric build.
Key features
Spiral generation around the player
Chunks are generated in expanding rings centered on the player's position, with the closest terrain always done first.
Automatic re-centering
When a player moves far enough from the last center, a new bundle fires and centers on the new position.
Resume after restart
The current ring index and center are saved, so generation picks up at the same ring after a quit or server restart.
TPS-aware pausing
Generation pauses when server TPS drops and continues when the server recovers.
Voxy LOD integration
With Voxy installed, newly generated terrain is registered for LOD rebuilds; without it, the new data waits for another trigger.
Gallery
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 2
How it compares
Auto Chunky is server-side only, licensed under the MIT License, not open source, and covers 1.21.1 – 1.21.11 on Fabric. Fabric/Quilt Chunk Pregenerator supports Fabric and Quilt for 1.19 – 1.21.1, is server-side only, and is open source under the GNU Lesser General Public License v3.0 only. Chunky Offline is open source under the MIT License and is needed on the server, with the client optional, for 1.21 – 26.3 on Fabric, Forge, NeoForge and Quilt.
| Mod | Loaders | Game versions | Environment | Updated |
|---|---|---|---|---|
| Chunky Pregenerator | Fabric | 1.21.11 | Server required, client optional | 2026-06-15 |
| Auto Chunky | Fabric | 1.21.1 – 1.21.11 | Server-side only | 2026-03-26 |
| Fabric/Quilt Chunk Pregenerator | Fabric and Quilt | 1.19 – 1.21.1 | Server-side only | 2025-09-10 |
| Chunky Offline | Fabric, Forge, NeoForge and Quilt | 1.21 – 26.3 | Server required, client optional | 2025-11-26 |
Questions
Does Chunky Pregenerator need Chunky installed?
Does the client need the mod?
What happens if the server is interrupted during generation?
In the catalog
Chunky Pregenerator is one of 8,515 World generation mods on ModsFinder, and one of 4,027 World generation mods for Fabric. 19,862 mods support Minecraft 1.21.11.
Similar mods
What the author says
A Fabric mod for Minecraft 1.21.11 that automatically pre-generates chunks around players using Chunky as the generation backend. Runs completely in the background, survives restarts mid-spiral, and works on both singleplayer and dedicated servers. Vibecoded using Claude. MIT licensed. Yes, it's incredibly polished…
Official listing
- Modrinth page
- modrinth.com/mod/chunky-pregenerator
- Owner
- nonprofit
- Published
- 2026-06-05
- Updated on Modrinth
- 2026-06-15
- Facts verified
- 2026-10-15