JT vs STEP — when to use each?

STEP for solid-model exchange (you'll edit the geometry). JT for visualisation, mockup, and large-assembly review (you'll only view and measure).

Software That Opens & Edits JT Files (6 Tools, 2026)

JT is the lightweight 3D visualisation format used heavily in automotive and aerospace mechanical design. Maintained by Siemens (and an ISO standard, ISO 14306), JT is designed for huge assembly visualisation — millions of parts, level-of-detail mesh data, attached PMI. It's the format of choice for digital-mockup workflows at the OEM level, particularly in supply chains anchored to Siemens NX and Teamcenter PLM.

Full read & write support (6)

O
OnshapeRead & Write
from $1500 · Web / iOS / Android · ★ 4.9
The professional CAD system built for agile cloud development.
S
SolidWorksRead & Write
from $1295 · Windows · ★ 4.9
The de-facto industry standard for 3D parametric mechanical design.
PC
PTC CreoRead & Write
from $2430 · Windows · ★ 4.8
The original parametric 3D CAD powerhouse.
SN
Siemens NXRead & Write
from $6000 · Windows / Linux · ★ 4.8
Powerful high-end CAD/CAM/CAE suite for advanced manufacturing.
AI
Autodesk InventorRead & Write
from $315 · Windows · ★ 4.7
Professional-grade 3D mechanical design and simulation.
C
CATIARead & Write
from $4500 · Windows · ★ 4.7
The high-end PLM standard for Aerospace and Automotive engineering.

Frequently asked

JT vs STEP — when to use each?: STEP for solid-model exchange (you'll edit the geometry). JT for visualisation, mockup, and large-assembly review (you'll only view and measure).

Full read & write support (6)

Frequently asked

Other file formats