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STL to STEP Assistant
Convert STL, GLB, and OBJ models to STEP offline and privately.

STL to STEP Assistant

STL to STEP Assistant is a focused local 3D model tool for converting mesh-based models into STEP files for CAD workflows.

DOMAIN INSIGHT

Choose export quality as needed

Small: fast, lightweight STEP export for everyday use; Balanced: balance detail and file size; Check triangle reduction by quality mode; Get a simple export risk hint; See the final STEP file size after conversion.

CORE FEATURES

Convert STL to STEP
Preview 3D models before export
Support STLB (binary STL), OBJ, GLB, GLTF, 3MF, 3DM (Rhino), FBX, DAE, PLY, USDZ, 3DS, AMF (additive manufacturing), DRC (Draco), KMZ (zipped 3D scene), MPD (multi-part LDraw), and WRL (VRML) model formats
Process files on device, so model data stays on your device

DESIGNED FOR

3D Printing HobbyistsEngineers3D makersDesignersCAD Users

QUESTIONS

Which mesh formats can be converted to STEP?

Besides STL and binary STL, it supports OBJ, GLB, GLTF, 3MF, 3DM (Rhino), FBX, DAE, PLY, USDZ, 3DS, AMF, DRC (Draco), KMZ, MPD, and WRL.

Are my models uploaded for conversion?

No. Files are processed on device, so model data stays on your device.

How do the export quality modes differ?

Small produces a fast, lightweight STEP export for everyday use, while Balanced trades file size against detail. You can check triangle reduction by quality mode, see an export risk hint, and view the final STEP file size after conversion.