Does the .nbt need to be a structure file?

Yes. NBT is a general data format, so this converter expects a Java Edition structure file, such as one saved by a structure block.

How do I import the world?

The converter downloads a .mcworld. Open it to import into Minecraft Bedrock, or unzip it into the games/com.mojang/minecraftWorlds folder.

Is there a size limit?

Structure blocks only place up to 48 blocks per axis in-game, but the converter reads the full .nbt, so larger structures saved by other tools convert fine.

Do Java blocks map cleanly to Bedrock?

Most common blocks map directly, but Java-only blocks and states use the closest Bedrock equivalent, so preview the result before exporting.

Convert .nbt to .mcworld

Turn a Java structure-block .nbt file into a Bedrock world you can load and walk through. Bloxelizer reads the structure, maps the blocks to Bedrock, and prepares a world archive. The file downloads as a .mcworld you can open directly to import it into Minecraft Bedrock.

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

.png

.jpg

.jpeg

Or paste a URL

Support Bloxelizer

Bloxelizer is free for everyone. Subscribing to Plus helps keep the platform running and funds new features — thank you!

2D build guide PDF export
Texture pack import & support across Bloxelizer
Voxelize 3D models and images using Modded Blocks
Private schematics
Team creation
Team sharing
Build progress tracking
Bulk converter access
No ads, forever
Plus-only upgrades

Subscribe to Plus

Starting at $3.99/mo · Cancel anytime

The .nbt and .mcworld formats

A structure-block .nbt file is Java Edition's own structure format: a block-state palette and a list of positioned blocks, intended to be placed by a structure block. A .mcworld is a complete Bedrock world — a zipped LevelDB save with a level.dat. The conversion maps the structure's Java blocks to Bedrock and writes them into a new Bedrock world so it loads as a playable save.

How to convert .nbt to .mcworld

Select the Java structure block's .nbt file.

Use the preview to confirm the bounds and Bedrock block mapping.

Keep .mcworld selected and download the world, then import it in Minecraft Bedrock.

When to use this conversion

Use this route to open a vanilla Java structure as a standalone Bedrock save without a structure block or a Java client.

Compatibility notes

Java and Bedrock treat some blocks, block entities, and states differently, so edition-exclusive blocks use the closest Bedrock match. The structure is placed in a generated world; review the preview first.