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JT Viewer
open and convert JT files

CATIA Siemens-NX CREO SolidWorks Solid Edge Inventor Rhino JT STEP X_T DWG-DXF IGES-SAT-VDA 3MF-STL PLY-3DS-WRL-OBJ

What are JT files?

  • Files with the JT file extension contain 3D models in the Jupiter Tessellation format, originally a pure visualization format, but now a complex exchange format for 3D designs. Many newer CAD programs can open and create JT files.
  • A current JT file can contain exact geometric data (JT-BREP, X_T-BREP), triangulated visualization data (MESH), the assembly structure, materials, colors and Product Manufacturing Information (PMI).
  • The format is being continuously developed and, together with the new STEP AP242, is set to become the standard for 3D data exchange in the future.

JT file viewer

JT Versions

In December 2012, JT was officially published under ISO 14306:2012 as a neutral and license-free 3D visualization format. The basis was JT version 9.5. It has been developed by Unigraphics Solutions since 1997 (version 6.4) for productive use on the basis of customer requirements.

In 2013, a second, extended version of the ISO standard was implemented and the international industry standard ISO/DIS 14506 V2 was officially published in 2017.

With the JT Open Toolkit, Siemens PLM provides a free C++ programming interface with which users have ISO-compliant read/write access to the extensive JT data. The current version is 10.8. (04/2024)

JT Assembly Variants

JT assemblies can be created in different variants:

  • monolithic creates a single file with all assemblies and parts.
  • per part (atomic) creates an assembly file and a folder of the same name with all parts as individual files.
  • shattered creates a file for each node, i.e. for each assembly, each subassembly, each part and each component.
  • PLMXML + JT creates an XML assembly file and an individual JT file for each part.
  • STEP + JT creates a STEP-AP242 assembly file and an individual JT file for each part.
  • same as NX (Siemens NX option) creates a corresponding JT-file for each Siemens NX PRT (assembly or part).

How do I Open JT files?

JT files can be read by many 3D visualization and design programs. New JT versions with exact geometries (BREP) can also be used by CAD/CAM software such as Siemens NX or Solid Edge.

To view a 3D design in JT format, there are free JT readers such as JT2Go from Siemens or some online viewers. The focus here is on the presentation rather than the analysis of the designs.

The 3D-Tool CAD viewer opens JT from version 8.0. Professional measuring tools and analyses utilize the full potential of JT data.

How Can I Convert a JT File?

If you do not have 3D or CAD software with a JT interface, the model must be exported from the original CAD system to a 3D format supported by your application.

Converting JT to STEP, JT to STL or to another 3D format is also possible with a 3D converter or CAD converter. However, only files that contain exact 3D geometries (BREPs) can be converted to STEP, IGES or other exact CAD formats. Files that only contain visualization data (MESH) can only be saved in visualization formats such as STL or VRML.

3D-Tool Premium contains the 3D‑NativeCAD Converter, which converts many 3D CAD formats including JT (BREPS) into common 3D exchange formats. The 3D-Tool Viewer converts JT models (BREP and MESH) in a number of MESH formats.

Test the JT Viewer and JT Converter

3D-Tool is a CAD viewer with interfaces for common native CAD formats and 3D exchange formats. 3D-Tool offers professional measurement functions, demolding analysis and wall thickness analysis.

  • Open and publish JT files for the 3D-Tool Free Viewer or as 3D-PDF
  • Open JT files and save as STL, 3DS, PLY, WRL, OBJ, or PLY
  • Convert exact JT data (BREP) to CATIA V5, IGES, VDA, SAT and X_T

Simply download the 3D-Tool, start it and request a trial key. Test for 14 days with all functions, all interfaces and the 3D-Native CAD-Converter. Open and convert JT, STEP, IGES, SAT, Parasolid and also CATIA, Siemens NX, Inventor, SolidWorks and other formats.

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