How do I add the world to Minecraft?

Unzip the download and put the world folder in .minecraft/saves. It then shows up in your singleplayer world list.

Is there a size limit like there is for structures?

No. A world has no structure-block or paste limit, so build sizes that would break a .nbt or overwhelm a server work fine here.

Which Minecraft version should I open it in?

One that supports the blocks in your palette. Choosing a target version in the converter before exporting keeps the world loadable on older clients.

Can I keep building around the model?

Yes. It is an ordinary Java save, so you can open it in creative and extend or edit anything in it.

Convert .obj to Java world

Walk around your 3D model in Minecraft Java. Bloxelizer voxelizes the .obj in your browser and packages the blocks as a Java world folder you can unzip into .minecraft/saves.

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 .obj and Java world formats

An .obj file describes a mesh as vertices and faces, with materials in a separate .mtl. A Minecraft Java world is a save folder: region (.mca) files holding the block data plus a level.dat describing the save. The conversion voxelizes the model into blocks and writes them straight into a fresh world folder, delivered as a .zip, so the model opens as its own singleplayer save rather than something you have to paste.

How to convert .obj to Java world

Select your .obj file, plus its .mtl and textures if it has them, in the converter below.

Choose the build size, rotation, and block palette in the preview panel, then apply.

Keep the Java world format selected, download the .zip, and unzip it into your saves folder.

When to use this conversion

Pick this route when the model is too big for a schematic paste or a structure block, and you would rather explore it at full scale in singleplayer than place it inside an existing build.

Compatibility notes

The build is written into a generated world, so load it in a Minecraft version that supports the blocks the palette chose. Colours require the .mtl and its textures alongside the .obj; very large build sizes are limited mainly by your browser's memory.