World Preview NeoForged

Preview your world before you create it. A port of World Preview by caeruleusDraconis to Neoforge 1.21.1

7.2K Downloads

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About this Mod

World Preview NeoForged

This is an unofficial port of the World Preview. The original mod did support 1.21.x but its only in fabric and forge modloaders. It was a vital mod for my use cases so I decided to port this incredibly versatile tool so the setup is easier especially when you are on the lookout for the perfect spawn.

IMPORTANT

However TFC does not have full compatibility with this port but World Preview TFC does.

Previews

Here are some of the previews provided by the mod.

Biomes

Showcase of first view

Structure locations

Structures

HeightMap

Heightmap

Y-intersection (Mask at a specific Y intersection)

Y-Intersection

Available Versions

World Preview NeoForged 1.3.0release

MC 1.21.1neoforge

April 1, 2026

How to Install World Preview NeoForged on Your Server

Order Server

Order a Minecraft Java server with at least 4 GB RAM (6 GB recommended).

Set neoforge Loader

In the panel under "Egg", select the neoforge loader and matching Minecraft version (1.21.1).

Install Mod

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

Compatibility

Mod Loaders

neoforge

Minecraft Versions

1.21.1

Server-side

✗ Unsupported

Recommended RAM

6 GB(min. 4 GB)

Frequently Asked Questions

World Preview NeoForged server crashes on startup – what to do?

Most common cause: wrong neoforge version or insufficient RAM. Check the server log (latest.log) for "OutOfMemoryError" or "Mixin" errors. With Mado Hosting: ensure at least 4 GB RAM is allocated and the loader matches the mod version (1.21.1). You can switch loaders with one click in the panel.

Is World Preview NeoForged compatible with neoforge?

World Preview NeoForged officially supports neoforge for Minecraft 1.21.1. The Mado dashboard automatically detects incompatible loader combinations.

Server lagging with World Preview NeoForged – how to optimize performance?

Recommended RAM: 6 GB (per 5 players). Use /spark profiler to check if World Preview NeoForged 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.