World Preview (Unofficial Port)
by seisou
World Preview (Unofficial Port) adds a Preview tab to the Singleplayer menu that shows biomes, structures and terrain for a seed before a world is generated.
What it does
When the Preview tab opens, a random seed is selected and its map is generated, showing biomes in the default overworld dimension, with structures and a heightmap drawn over the terrain. Players can change the seed from the new world screen, and the preview can also be opened on singleplayer worlds already in progress, an experimental feature. The Settings button in the top-left corner has moved to the Preview tab.
The fork is maintained by its community and updated for Minecraft 1.21.11 and later, with a redesigned interface and new features while keeping the original experience. A mod compatibility framework detects mods such as TerraFirmaCraft and applies workarounds. The code is open source under the Apache License 2.0, with public links to the source code and issue tracker. The mod is published for Fabric and NeoForge, requires Fabric API on Fabric, and is installed on the client and server.
Key features
Seed preview on the new world screen
A preview map of the chosen seed appears in the new world screen before the world is created.
Zoom and navigation
Zoom levels of 32 and 64 pixels per chunk are set with Ctrl and scroll, and the arrow keys pan while Home recenters the map.
Layer and height views
Biome, colorized heightmap and y-layer views can be toggled, with the layer one step below drawn in a lighter color.
Preloaded areas
Areas beyond the visible range are loaded ahead of time, which reduces stuttering while dragging the map.
Structure visibility
Individual structure types can be shown or hidden in the preview.
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 1
Use cases
Who it’s for: Players who choose seeds for survival or exploration worlds, and server owners who want to inspect a seed before creating a world. Fabric API is needed on Fabric.
How it compares
Seed Viewer is client-side only, released under the MIT License, and runs on Fabric and NeoForge for 1.21.1 – 26.2, but it is not open source. World Preview TFC is client-side only, open source under the Apache License 2.0 and built for NeoForge 1.21.1 only. World Preview Prime is client-side only, open source under the Apache License 2.0 and covers Fabric and NeoForge for 26.1 – 26.1.2, a narrower range than this mod.
| Mod | Loaders | Game versions | Environment | Updated |
|---|---|---|---|---|
| World Preview (Unofficial Port) | Fabric and NeoForge | 1.21.11 – 26.2 | Client and server | 2026-08-11 |
| Seed Viewer | Fabric and NeoForge | 1.21.1 – 26.2 | Client-side only | 2026-07-17 |
| World Preview TFC | NeoForge | 1.21.1 | Client-side only | 2026-07-10 |
| World Preview Prime | Fabric and NeoForge | 26.1 – 26.1.2 | Client-side only | 2026-06-27 |
Questions
Does World Preview need Fabric API?
Does the server need World Preview?
Which game versions does this port cover?
In the catalog
World Preview (Unofficial Port) is one of 8,515 World generation mods on ModsFinder, and one of 4,027 World generation mods for Fabric. 13,894 mods support Minecraft 26.2.
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What the author says
World Preview is a mod for visualizing Minecraft world seeds before they are generated. This is a community-maintained fork of the original World Preview by Caeruleus Draconis & Taiterio. The original project has not been updated since Minecraft 1.21. This fork upgrades the mod for Minecraft 1.21.11 and later, adding…
Official listing
- Modrinth page
- modrinth.com/mod/world-preview-fork
- Owner
- seisou
- Published
- 2026-07-28
- Updated on Modrinth
- 2026-08-11
- Facts verified
- 2026-10-15