Where it is used
Automotive, aerospace and complex surface design rely heavily on CATIA.
Format Guide中文
What is CATIA?
CATIA is a high-end CAD/CAE/CAM system from Dassault Syst\u00e8mes, widely used in automotive and aerospace. Its native files use the .CATPart (parts) and .CATProduct (assemblies) extensions.
Published Jun 10, 2026Updated Jun 10, 2026
Native files
.CATPart holds individual parts; .CATProduct holds assemblies and their structure.
Sharing CATIA
Outside CATIA seats, models are usually shared as STEP or visualized as glTF.
Working with CATIA data
Because CATIA licenses are expensive, partners and suppliers often need to view or convert CATIA files without a CATIA seat.
For cross-CAD engineering exchange, CATIA is typically exported to the neutral STEP format.
View or convert online
To confirm a CATIA model, use the online CATIA viewer.
To reuse it, convert CATIA to STEP for engineering, or to glTF / OBJ / STL / FBX for web, rendering, printing or animation.