🛠️ Convert GLTF to JSON: GLB Transmission Format to CityJSON Model Converter

How to Convert GLTF to JSON?

Our step-by-step guide takes all the complexity out of GLTF to JSON conversion - pair it with our robust tool for flawless results every time:

  1. 📥 Download and Install

    Download and install Autoconverter on your system. This application will let you to convert your GLTF files to JSON format - no additional CAD software required.

  2. 📂 Open Your GLTF File

    Go to File > Open… to load your GLTF file (*.gltf, *.glb), or drag and drop it directly into the application window. The model loads into the 3D viewport for inspection before converting.

  3. 💾 Save As JSON Format

    Go to File > Save As…, select JSON (*.json, *.cityjson) as the output format, choose your destination folder and filename, then click Save to complete the GLTF to JSON conversion.

GLB GLTF and GLB 3D File Format

The GLTF (GL Transmission Format) and GLB file types are modern open standards developed by the Khronos Group for efficient storage, transmission, and rendering of 3D models. Designed for the web, gaming, VR/AR, and real-time applications, these formats enable compact, high-performance 3D asset workflows across platforms.

Key Features of GLTF and GLB Files

  • GLTF Versions:
    • GLTF 1.0: Supports basic geometry, textures, simple materials, and skeletal animations with joint hierarchies.
    • GLTF 2.0: Adds advanced features like PBR (Physically Based Rendering) materials, Draco compression, morph targets, skinning, and enhanced animation capabilities.
  • ASCII vs Binary: GLTF files are human-readable (JSON format), while GLB files combine 3D data, textures, and materials into a compact, binary format for faster loading and easier distribution.
  • Embedded Textures: Both GLTF and GLB can embed textures directly, creating self-contained 3D assets ideal for web and mobile applications.

Convert GLTF and GLB Files

With Autoconverter and Automesher Application, you can easily import, export, and convert GLTF and GLB files to formats like OBJ, FBX, STL, and more. Our software supports Draco compression, enabling significantly smaller file sizes while preserving the quality and performance of your 3D assets.

JSON 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!

GLTF vs JSON - Comparison

This comparison helps clarify the differences between GLTF and JSON so you can choose the best format for 3D modeling, CAD, and GIS workflows.

Feature GLTF JSON
Extensions .gltf, .glb .json, .cityjson
Name GL Transmission File CityJSON
Versions
  • Min: GLTF V1
  • Max: GLTF V2
🚫
Textures ✅ ✅
Colors ✅ ✅
Geometry Components ✅ ✅
User Attributes ❌ ✅
Quads ❌ ✅
Importers
Exporters

More GLTF and JSON Conversion Guides

Get your GLTF to JSON conversion right the first time. Our expert guides below cover everything you need for successful GLTF files conversion:

👉 Get fast, accurate GLTF and JSON conversion without the complexity. Our GLTF to JSON converter is built for professionals who need reliable results every time.