Software
Here is a list of sofware that we believe are useful to practioners and researchers dealing with CityJSON.
Free and open-source software are marked by 
.
Software for experimental features can be found in the respective pages of the Experimental section of the website.
Most of the software are recent and well-maintained; if you believe your software should be there please let us know.
Summary table
| Software | View | Generate | Edit | Convert | Parse/API | Validate | Store | ||
|---|---|---|---|---|---|---|---|---|---|
| 3D City DB | |||||||||
| 3dfier | |||||||||
| Autoconverter | |||||||||
| azul | |||||||||
| C# library | |||||||||
| citygml-tools | |||||||||
| citygml4j | |||||||||
| CityJSON MCP / Datum | |||||||||
| cityjson2jsonfg | |||||||||
| cjdb | |||||||||
| cjio | |||||||||
| cjseq | |||||||||
| cjval | |||||||||
| FME | |||||||||
| IFCCityJSON | |||||||||
| Measur3D | |||||||||
| ninja | |||||||||
| NSGI CRS API | |||||||||
| ParaView reader | |||||||||
| QGIS plugin | |||||||||
| RevitCityJSONImporter | |||||||||
| RhinoCity | |||||||||
| RhinoCityJSONReader | |||||||||
| Schema Store | |||||||||
| tyler | |||||||||
| Up3date | |||||||||
| val3dity | |||||||||
| xeokit | |||||||||
| Command Line Interface (CLI); Graphical User Interface (GUI); Both CLI & GUI | |||||||||
| Application; Library; Both Application & Library | |||||||||
Table of contents
Viewers
tyler
Creates 3D tiles from CityJSON
Autoconverter
Import, export and convert many 3D mesh and solid file formats
azul
A native and fast CityJSON viewer for macOS
FME
FME 2020+ has built-in capabilities to read/write CityJSON. And its viewer is the only one supporting textures (at this moment)
Measur3D
A light and compact CityJSON management tool. This tool is built as a high-level MERN application. It therefore allows developing with a single language in both server and client side.
ninja
Official CityJSON viewer, it supports holes and the ability to edit, all within the ease of your browser
ParaView reader
A plugin that allows you to read CityJSON files directly into ParaView
QGIS plugin
A plugin that supports the loading of CityJSON datasets in QGIS3; these can be queried like any other layers in QGIS
Up3date
Plugin to open/import directly CityJSON models in Blender, attributes and semantics are kept
xeokit
Open-source web programming toolkit, offers a converter from CityJSON to their own format
Generators
3dfier
Takes 2D GIS datasets and “3dfies” them by lifting each polygon to its height (obtained with LiDAR). Outputs CityJSON, CityGML, and OBJ
FME
FME 2020+ has built-in capabilities to read/write CityJSON. And its viewer is the only one supporting textures (at this moment)
RhinoCity
A plugin for Rhino to produce, edit, analyse, and texture 3D data. Reads and writes CityJSON
Editors
ninja
Official CityJSON viewer, it supports holes and the ability to edit, all within the ease of your browser
RevitCityJSONImporter
A plugin for Revit to import and reproject CityJSON’s geometries and attributes
RhinoCity
A plugin for Rhino to produce, edit, analyse, and texture 3D data. Reads and writes CityJSON
RhinoCityJSONReader
A Rhino/Grasshopper plugin, semantics is supported
Up3date
Plugin to open/import directly CityJSON models in Blender, attributes and semantics are kept
Converters
cjseq
Conversion CityJSON <=> CityJSONSeq
NSGI CRS API
Performs coordinate transformations on GeoJSON and CityJSON files using the official RDNAPTRANS™ transformation procedure and other transformations defined or recommended by NSGI
tyler
Creates 3D tiles from CityJSON
cityjson2jsonfg
A command line tool for converting CityJSON files to JSON-FG format
CityJSON MCP / Datum
MCP tools for inspecting, validating, transforming, and querying CityJSON models, with Datum providing a chat application interface.
Autoconverter
Import, export and convert many 3D mesh and solid file formats
citygml-tools
CLI created with citygml4j, it allows us to convert CityJSON <-> CityGML in one-click
cjio
Python CLI to process and manipulate CityJSON files. Used as the ‘official’ validator for CityJSON files
FME
FME 2020+ has built-in capabilities to read/write CityJSON. And its viewer is the only one supporting textures (at this moment)
RevitCityJSONImporter
A plugin for Revit to import and reproject CityJSON’s geometries and attributes
RhinoCity
A plugin for Rhino to produce, edit, analyse, and texture 3D data. Reads and writes CityJSON
RhinoCityJSONReader
A Rhino/Grasshopper plugin, semantics is supported
IFCCityJSON
Convert CityJSON files to IFC
Storage
cjdb
cjdb is a tool enabling CityJSON integration with a PostgreSQL database
CityJSON MCP / Datum
MCP tools for inspecting, validating, transforming, and querying CityJSON models, with Datum providing a chat application interface.
3D City DB
Free geo-database to store, represent, and manage virtual 3D city models on top of a standard spatial relational database (PostGIS and Oracle)
Measur3D
A light and compact CityJSON management tool. This tool is built as a high-level MERN application. It therefore allows developing with a single language in both server and client side.
Parsers and API for programmers
CityJSON MCP / Datum
MCP tools for inspecting, validating, transforming, and querying CityJSON models, with Datum providing a chat application interface.
citygml4j
Open source Java class library and API
cjio
Python CLI to process and manipulate CityJSON files. Used as the ‘official’ validator for CityJSON files
Schema Store
The JSON API contains a list of JSON Schema files for known JSON file formats. Each schema file can be used in tooling such as command line validators, editor auto-completion etc.
C# library
Open source C# library to read/write CityJSON
Validators
(look at the tutorial on validation where more details are available)
CityJSON MCP / Datum
MCP tools for inspecting, validating, transforming, and querying CityJSON models, with Datum providing a chat application interface.
cjio
Python CLI to process and manipulate CityJSON files. Used as the ‘official’ validator for CityJSON files
cjval
Used as the official validator for CityJSON files
val3dity
Validation of 3D GML primitives according to the international standard ISO19107