What is CATIA to STEP used for?

CATIA is a proprietary format that others cannot open without CATIA. Converting to STEP — a universal neutral format — lets almost any CAD read it, ideal for sending to clients, suppliers and archives.

Does it keep solid geometry?

CATIA and STEP are both precise B-rep solid formats, so the conversion is a solid-level exchange that typically preserves geometric accuracy.

Is the CATIA to STEP conversion free and online?

Yes. Upload your .CATPart / .CATProduct file and choose STEP as the target — no CATIA or other software required.

CATIA to STEP中文

CATIA to STEP Converter Online

Convert CATIA (.CATPart / .CATProduct) models into universal STEP files for cross-CAD collaboration and archiving. Done online in WO3D — no CATIA license required.

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Break proprietary lock-in

STEP opens in almost any CAD, so people without CATIA can still use the model.

Keep solid geometry

Solid-level exchange preserves geometry for continued modeling downstream.

No install

No CATIA license needed — upload CATPart in the browser and get STEP out.

When to use it

When design uses CATIA but downstream suppliers, clients or partners run SolidWorks, NX or Creo, STEP is the common language everyone can open.

Sending raw CATIA often leads to files nobody can open — converting to STEP first removes that friction.

STEP or IGES?

Prefer STEP in most cases: better support for solids and assemblies, and a more modern standard.

Only use IGES when the recipient specifically requires it (often legacy systems or surface exchange).

Just need to view it?

If you only need to look at the model, use the online CATIA viewer — no conversion needed.

For web or mobile display, convert to glTF instead of STEP.