đ§ STEP Viewer
View STEP CAD files directly in your browser. No upload, no registration, 100% private.
Drop your STEP file here
or click to browse â max 100 MB (.step / .stp)
đ How to Use STEP Viewer
- Upload your STEP file â Drag and drop .step or .stp, or click "Choose File".
- View the file info â See file name, size, and detected header.
- Note the limitation â Full 3D rendering requires OpenCascade.js (coming soon).
- Use FreeCAD for now â For accurate 3D preview, open your STEP in FreeCAD or CAD Assistant.
- Stay tuned â Full STEP 3D rendering is coming in Q1 2026.
âšī¸ About STEP Viewer
STEP Viewer is a free browser-based tool for previewing STEP (Standard for the Exchange of Product Data) CAD files. STEP is a widely-used ISO standard for 3D CAD data exchange between engineering software.
This viewer currently provides a preview with a placeholder rendering. Full 3D STEP rendering requires OpenCascade.js (a large WASM library) and is planned for a future update.
For accurate 3D STEP preview, we recommend using FreeCAD, CAD Assistant, or other professional CAD software in the meantime.
⨠Why Choose SmartCAD STEP Viewer
STEP File Preview
Load STEP files and view a placeholder rendering.
File Info
See file name, size, and detected header.
Clean Interface
Same design as STL and OBJ viewers.
Complete Privacy
Your STEP file never leaves your device.
â Frequently Asked Questions
Is my STEP file uploaded to a server?
No. All processing happens in your browser. Your file never leaves your device.
When will full 3D STEP rendering be available?
Full rendering requires OpenCascade.js (large WASM). Planned for Q1 2026.
What can I do with the current preview?
Verify file type and size. For accurate 3D preview, use FreeCAD or CAD Assistant.
Which STEP versions are supported?
The viewer reads the file header. Full parsing will be available with the 3D update.
Can I convert STEP to STL?
Not currently. Use FreeCAD to export STEP to STL.