How to Convert JSON to 3DM?
Ready to convert JSON to 3DM? Follow this practical step-by-step guide and get it done with our powerful conversion tool:
📥 Download and Install
Download and install Autoconverter on your system. This application will let you to convert your JSON files to 3DM format - no additional CAD software required.
📂 Open Your JSON File
Go to File > Open to load your JSON file (*.json, *.cityjson), or drag and drop it directly into the application window. The model loads into the 3D viewport for inspection before converting.
💾 Save As 3DM Format
Go to File > Save As, select 3DM (*.3dm) as the output format, choose your destination folder and filename, then click Save to complete the JSON to 3DM conversion.
3D City Model (CityJSON) File
The CityJSON file format is a modern, JSON-based (JavaScript Object Notation) standard designed for storing and exchanging 3D city models. It efficiently encodes buildings, roads, bridges, urban furniture, and other city objects, offering strong support for textures, semantics, and detailed metadata. CityJSON is a lightweight alternative to CityGML, optimized for simplicity, web integration, and high-performance applications.
Key Features of CityJSON Files
- JSON Simplicity: CityJSON files are lightweight, human-readable, and easily parsed by common programming languages, avoiding the complexity of XML structures like in CityGML.
- Semantic Data: Preserves rich metadata, including building heights, roof shapes, material classifications, and road types, enhancing 3D GIS and urban analysis.
- LOD (Level of Detail) Support: Manages multiple levels of detail (LOD1 through LOD4) to suit diverse visualization, simulation, and analysis needs.
- Web-Friendly Format: Perfect for 3D web visualization and integration with JavaScript libraries like Cesium and Three.js.
- Open and Extensible: Developed by the 3D Geoinformation Group (Delft University of Technology), CityJSON is an open standard that promotes interoperability and innovation.
- File Extension Note: Both CityJSON and GeoJSON use the .json extension - ensure you verify the file structure before processing to avoid errors.
CityJSON File Conversion Made Easy
With Autoconverter and Automesher Application, you can seamlessly import, export, and convert CityJSON files into formats like STL, OBJ, SKP (SketchUp), and 3DS. Our tools preserve geometric precision and semantic information, making it easy to integrate 3D city models into your CAD, GIS, and 3D visualization workflows.
Streamline Your 3D City Modeling Today
Optimize your urban planning, GIS projects, and 3D web applications with powerful CityJSON file conversion. Try Autoconverter and Automesher Application now and unlock the full potential of CityJSON in your workflows!
Rhinoceros 3D (3DM) File Format
The 3DM file format is the native format for Rhinoceros 3D (Rhino), a leading NURBS-based 3D modeling software used across industries like architecture, engineering, and industrial design. 3DM files accurately store mathematical representations of curves, surfaces, solids, and meshes, making them essential for precision 3D modeling and CAD workflows.
Key Features of 3DM Files
- NURBS Geometry: Supports precise, smooth surfaces critical for advanced design and engineering projects.
- Polygonal Meshes: Stores tessellated 3D models ideal for rendering, simulation, and 3D printing workflows.
- SubD Surfaces: Allows flexible, editable subdivision modeling for organic shapes and complex surfaces.
- Instance References: Saves memory by creating linked object instances, optimizing large and detailed models.
Convert 3DM Files Seamlessly
Autoconverter and Autoshaper simplify 3DM file conversion to popular formats like STEP, IGES, OBJ, STL, and DWG. Automate the export of 3DM polygon meshes for 3D printing, or preserve NURBS data for engineering-grade CAD models. Save files in legacy (Rhino 2.X - 7.X) or latest Rhino 8.X formats to ensure compatibility across all project environments.
JSON vs 3DM - Comparison
This table provides a clear comparison of JSON vs 3DM formats, making it easier to choose the right file type for 3D modeling, CAD, and GIS use.
| Feature | JSON | 3DM |
|---|---|---|
| Extensions | .json, .cityjson | .3dm |
| Name | CityJSON | Rhinoceros 3D Model |
| Versions | 🚫 |
|
| Textures | ✅ | ✅ |
| Colors | ✅ | ✅ |
| Geometry Components | ✅ | ✅ |
| User Attributes | ✅ | ✅ |
| Quads | ✅ | ✅ |
| Importers | ||
| Exporters |
More JSON and 3DM Conversion Guides
Need help with JSON to 3DM conversion? Browse our expert guides below and make JSON files conversion simple and stress-free:
- 🔬 Convert Mesh to NURBS for Rhino 3D (3DM) with Autoshaper
- ⚙️ 3D Mesh File Converter (STL, OBJ, STEP, SKP & 30+ Formats)
- 🧩 Quads and N-Gons in 3D Mesh Formats: Polygons Support
- 🔁 STEP to 3DM: Convert STP Files with NURBS for Rhino
- 🌀 Convert Point Cloud or Mesh to NURBS with Autoshaper
👉 Need a reliable way to convert JSON and 3DM formats? Use our JSON to 3DM converter now and get accurate, professional results in seconds.