What is a .prefab.json file?

It is Hytale's prefab format — a JSON description of positioned blocks using Hytale's block names — that you can import into a Hytale project.

Will every Minecraft block have a Hytale match?

Common blocks map to a close Hytale equivalent. Blocks without a match are reported so you can review or replace them.

Does the .schem need to be Sponge format?

Yes. This route reads modern Sponge .schem files. Legacy .schematic files should be upgraded with the schematic-to-schem route first.

Does redstone or entity data carry over?

No. A prefab captures blocks and their positions, not functional block behavior or entities.

Convert .schem to .prefab.json

Bring a WorldEdit or Sponge schematic into Hytale. Bloxelizer reads the .schem palette, maps the blocks to Hytale, and exports a .prefab.json prefab.

Free & unlimited

Runs in your browser

3D & layer previews

Drop a Minecraft schematic

orBrowse

We'll detect the format, let you view your build layer by layer in 2D / 3D, and let you export it to any format.

.schem

.litematic

.bp

.mcstructure

.nbt

.schematic

.mcstructurezip

.mcworld

.zip(Java world)

.prefab.json

.json

.glb

.gltf

.obj

.mtl

.stl

.bbmodel

.geo.json

.png

.jpg

.jpeg

.webp

Or paste a URL

The .schem and .prefab.json formats

A Sponge .schem stores Java block states for WorldEdit and FAWE. A Hytale .prefab.json is Hytale's prefab format: a JSON list of positioned blocks referencing Hytale's own block names. The conversion maps each Minecraft block to its closest Hytale equivalent and writes the build as a prefab you can drop into a Hytale project.

How to convert .schem to .prefab.json

Upload your .schem file in the converter below.

Check the Hytale block mapping in the 3D or layer preview.

Keep .prefab.json selected and download the Hytale prefab.

When to use this conversion

Use this route to move a Minecraft schematic into a Hytale build or map project as a reusable prefab.

Compatibility notes

Minecraft and Hytale have different block sets, so each block maps to the closest Hytale match and some may have no exact equivalent. Review the preview and the missing-block report before using the prefab.