Why convert JT to STP?
STEP (ISO 10303) - also saved as .stp - is the neutral exchange format that most mechanical CAD applications import natively. JT is a visualization format optimized for fast display rather than direct editing, so STP is the correct target when you need to open a JT model in SolidWorks, CATIA, Creo, or a similar tool.
How to convert JT to STP
CAD Assistant FREE
Open the .jt file in CAD Assistant; go to File > Export > STEP and save with the .stp extension. The file is ready to import in any STEP-compatible CAD tool.
FreeCAD OPEN-SOURCE
File > Open the .jt in FreeCAD; then File > Export > STEP (*.step *.stp) and click Save.
Siemens NX APP
File > Open the JT in NX; go to File > Export > STEP 214 for highest-fidelity output when B-rep geometry is present.
Programs that convert JT
About these formats
.JT
JT (Jupiter Tessellation) 3D CAD visualization file
A JT (Jupiter Tessellation) file is a compact 3D CAD model used in automotive and aerospace engineering to share and review designs without heavy native CAD software. The free way to open…
Open .JT details →
.STP
STEP - Standard for the Exchange of Product Data (ISO 10303), .stp spelling
An STP file is a 3D CAD model - a part or assembly - stored in the ISO 10303 STEP format so it can move between different CAD programs. The fastest free options are FreeCAD, CAD Assistant,…
Open .STP details →Quality & what to watch
- .stp and .step are the same format (ISO 10303); use whichever extension your CAD tool expects.
- B-rep geometry in the JT produces a clean, editable solid in STP; mesh-only JT yields a faceted approximation that limits downstream editing.
- AP214 is the most common STEP variant; both CAD Assistant and FreeCAD export it by default.
