JT (Jupiter Tesselation) is an ISO-standardized 3D data format and is in industry used for product visualization, collaboration, CAD data exchange, and in some also for long-term data retention. It can contain any combination of approximate (faceted) data, boundary representation surfaces (B-Rep), Product and Manufacturing Information (PMI), and Metadata (textual attributes) either exported from the native CAD system or inserted by a product data management (PDM) system.

In 2012 JT received a status of international standard ISO14306.

JT files are used in product lifecycle management (PLM) software programs and their respective CAD solutions, by engineers and other professionals that need to analyze the geometry of complex products. The format and associated software is structured so that extremely large numbers of components can be quickly loaded, shaded and manipulated in real-time. Because all major 3D CAD formats are supported, a JT assembly can contain a mixture of any combination which has led to the term "multi-CAD". As JT is typically implemented as an integral part of a PLM solution, the resulting multi-CAD assembly is managed such that changes to the original CAD product definition files can be automatically synchronized with their associated JT files resulting in a multi-CAD assembly that is always up-to-date.

CAD Exchanger supports all recent versions of JT which are most broadly used in industry from JT8 to JT10.

Supported by:


  • B-Rep representations
  • polygonal representations (incl. multi-LODs)
  • colors and materials
  • meta-data (names, properties, layers)
  • assembly structure
  • external files
  • validation properties

Import (read) JT

Export (write) JT


Software vendors can use CAD Exchanger SDK to extend their C++, C# and Java applications to read, write, convert, visualize, analyze, triangulate or otherwise process JT files. For details about JT support by CAD Exchanger SDK please refer to the User’s Guide. For free evaluation of SDK please contact us at This email address is being protected from spambots. You need JavaScript enabled to view it..