craftplicator
Open a Java world, look at it, take pieces out of it, put models into it. Nothing to install.
Getting started
1. Copy your world. On Windows your worlds are in %AppData%\.minecraft\saves. Copy the one you want somewhere else and work on the copy. Nothing here modifies a world unless you ask it to, but save data deserves the habit.
2. Open it. Press Choose folder and paste the path into the address bar of the dialog. Or zip the world folder and drop the zip onto the page, which avoids the dialog entirely.
3. Close Minecraft if you plan to write anything back. A running game overwrites changes at its next save.
Can’t find your world? → · Full guide → · Questions →
Importing a 3D model
The tool reads .glb, .stl, .obj and .ply.
If your file is something else — FBX, DAE, 3MF, a Blender file — or if it is an OBJ whose colours live in separate .mtl and texture files, convert it first with the 3D file format converter. It writes GLB, which carries geometry, colours and textures in one file and is the format that works best here.
Grey results almost always come down to the format. STL cannot store colour at all, and OBJ only keeps it when it is stored per vertex rather than in a material file.
What it can and cannot do
Java Edition worlds from 1.13 to the current version, in all three dimensions. Bedrock worlds — from consoles, phones and the Windows store — use a different storage format and are not supported.
Chrome and Edge support everything, including writing changed region files back into a world folder. Firefox and Safari read, browse, walk and export. The first-person view needs WebGL 2, which every current desktop browser has.
Stairs, slabs and fences become full cubes in exports and in the 3D views, and water is opaque there. Neither affects schematics, which keep every block state exactly.
Before you use it
Worlds, models and textures you bring here need to be yours, or something you have permission to use. By using the service you confirm that, and you grant us a non-exclusive, royalty-free right to use the content you submit and anything produced from it. The Terms of Use set out the scope and are the binding text.
If your organisation cannot make that confirmation — a common situation for museums and archives working with collection material — get in touch first. Different terms can be arranged, and that is a much easier conversation before a project than after it.
Craftplicator is free for private, educational and other non-commercial use. Commercial licences are available on request.
Not an official Minecraft product. Not approved by or associated with Mojang or Microsoft.