Convert JSON Files to 3DM


JSON to 3DM Conversion

Here is a list of valuable resources, filled with step-by-step instructions and expert tips for converting JSON files to 3DM format with our converters. Dive in now to make your JSON files conversion easier later.

JSON vs. 3DM Comparison

Property JSON 3DM
Extensions .json .3dm
Name CityJSON Rhinoceros 3D Model
  • Min: Rhino 2.x
  • Max: Rhino 8.x
Geometry components


A file format for the efficient storage and exchange of 3D city models and landscapes. It has the following benefits and features:

  • Optimized CityGML: The CityJSON format is based on CityGML, which is an OGC standard for representing and exchanging 3D urban data. However, CityJSON is optimized for simplicity and efficiency, using JSON instead of XML as the underlying syntax. CityJSON reduces the file size and complexity of CityGML files, making them easier to process and manipulate.
  • 3D City Data: The CityJSON files can store 3D city models and landscapes, which are composed of various city objects, such as buildings, roads, bridges, vegetation, etc. Each city object has a name, a geometry, and a set of attributes. The format also supports nested hierarchy, reusable geometry component instances, and custom materials with texture images, which enhance the realism and detail of the 3D city data.
  • CityJSON Converter: Autoconverter allows you to import and export CityJSON files, and convert them into various other 3D mesh file formats, such as STL, OBJ, SKP, 3DS`, etc. Our software supports the reading and writing of CityJSON geometries with custom attributes, which preserve the semantic information of the 3D city data.

3DM Rhinoceros 3D File

The native file format for Rhinoceros 3D software. Used for various purposes like product design, architecture, and engineering. It has the following features:

  • Geometry Data Types: 3DM allows for the storage of a variety of 3D geometry data types, including smooth NURBS surfaces, triangular meshes, points, and curves. Each data type has its own advantages and applications in 3D modeling.
  • 3DM File Converters: Our software products allow you to import and export 3DM files, and convert them into various other file formats. Autoconverter can export only polygonal meshes, while Autoshaper can export NURBS shapes, which are more accurate and smooth.
  • Flexibility in File Versions: These invaluable 3DM file converters also offer the flexibility to save Rhino files in various 3DM file versions, ranging from Rhino 2.X to the most recent Rhino 8.X version. This feature enhances the versatility and applicability of 3DM in different software environments.