World Pregen

World Pregen is a datapack that allows you to automatically pre-generates a map and prevents lag caused by generation while you are playing.

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Rent Server with this Mod

About this Mod

🗺️ World Pregen

World Pregen is a datapack that allows you to automatically pre-generates a map and prevents lag caused by generation while you are playing.

Commands to know

▶️ /function wp:[dimension]/[size] > Start pre-generation
- Dimension name: overworld, the_end, the_nether
- Size options: 2k, 4k, 6k, 8k, 10k, 20k (2k → 1000/-1000)
⏸️ /function wp:pause > Pause pre-generatino

Available Versions

World Pregen for MC 1.21.9-26.1.xrelease

MC 1.21.9, 1.21.10, 1.21.11, 26.1, 26.1.1, 26.1.2fabric, forge, neoforge, quilt

March 24, 2026

World Pregen for MC 1.21.9-26.1.xrelease

MC 1.21.9, 1.21.10, 1.21.11, 26.1, 26.1.1, 26.1.2datapack

March 24, 2026

World Pregen for MC 1.21.9-.11release

MC 1.21.9, 1.21.10, 1.21.11fabric, forge, neoforge, quilt

January 3, 2026

World Pregen for MC 1.21.9-.11release

MC 1.21.9, 1.21.10, 1.21.11datapack

January 3, 2026

How to Install World Pregen on Your Server

Order Server

Order a Minecraft Java server with at least 3 GB RAM (4 GB recommended).

Set datapack Loader

In the panel under "Egg", select the datapack loader and matching Minecraft version (26.1.2).

Install Mod

Open the mod browser in the dashboard and search for "World Pregen". Click "Install" – done! Alternatively, upload the .jar via SFTP to the /mods folder.

Compatibility

Mod Loaders

datapackfabricforgeneoforgequilt

Minecraft Versions

26.1.2, 26.1.1, 26.1 (+3 more)

Server-side

✓ Required

Recommended RAM

4 GB(min. 3 GB)

Frequently Asked Questions

World Pregen server crashes on startup – what to do?

Most common cause: wrong datapack version or insufficient RAM. Check the server log (latest.log) for "OutOfMemoryError" or "Mixin" errors. With Mado Hosting: ensure at least 3 GB RAM is allocated and the loader matches the mod version (26.1.2). You can switch loaders with one click in the panel.

Is World Pregen compatible with datapack and fabric and forge and neoforge and quilt?

World Pregen officially supports datapack, fabric, forge, neoforge, quilt for Minecraft 26.1.2, 26.1.1, 26.1. Note: Forge and Fabric mods are NOT cross-compatible – pick one loader and stick with it. The Mado dashboard automatically detects incompatible loader combinations.

Server lagging with World Pregen – how to optimize performance?

Recommended RAM: 4 GB (per 8 players). Use /spark profiler to check if World Pregen consumes the most tick time. Common fixes: reduce server view-distance to 8-10, install "performant" or "starlight" as supplementary mods on Forge. With Mado Hosting, your server runs on NVMe SSDs with dedicated CPU cores for minimal latency.