Why convert JT to STEP?
JT is a visualization format optimized for fast display, not direct editing. .step (ISO 10303) is the neutral exchange format that mechanical CAD applications import natively, making it the correct target when you need to edit a part, run simulation on it, or hand it to a colleague using a different CAD system.
How to convert JT to STEP
CAD Assistant FREE
Open the .jt file in CAD Assistant; go to File > Export and choose STEP. The .step file is written to the chosen location and is ready for any STEP-compatible CAD tool.
FreeCAD OPEN-SOURCE
File > Open the .jt; then File > Export > STEP (*.step) and click Save.
Siemens NX APP
File > Open the JT in NX; go to File > Export > STEP 214 for full-fidelity output when the JT contains B-rep geometry.
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 →
.STEP
STEP - Standard for the Exchange of Product Data (ISO 10303)
A STEP file is a 3D CAD model stored in the ISO 10303 neutral format so engineers can share geometry between different CAD programs. To view one for free, use FreeCAD, CAD Assistant, or…
Open .STEP details →Quality & what to watch
- A JT file can contain precise B-rep geometry, a tessellated mesh, or both; only B-rep produces a fully editable solid in STEP.
- If the STEP output looks faceted when opened in your CAD tool, the source JT was mesh-only and lacks precise solid geometry.
- STEP AP214 (or AP242) is recommended for modern CAD compatibility; CAD Assistant exports AP214 by default.
