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Files stay in your browser for preview.STEP, STP tool
STEP File Inspector Online
Unlock STEP tools once for $1.90 to inspect compatible STEP or STP CAD geometry locally in your browser.
Sign in, then unlock this viewer once for $1.90. Files stay in your browser; VIP also includes viewer access plus advanced workflows.
Unlock large files, conversion, HD screenshots, recording, AR, and XR experiences.
About this 3D viewer
Inspect a compatible STEP or STP CAD file locally after browser tessellation. The inspector reports generated mesh groups, vertices, triangles, and preview dimensions for a quick engineering-file review.
STEP and STP files from SolidWorks, Fusion 360, FreeCAD, and CATIA
Use a current desktop browser on Windows, macOS, or Linux to inspect compatible STEP or STP exchange files from SolidWorks, Fusion 360, FreeCAD, CATIA, Creo, or similar CAD software. The browser shows a tessellated display mesh, not native feature history, PMI, or manufacturing validation.
How to use this STEP viewer
- Sign in and unlock STEP tools once.
- Upload a compatible .step or .stp CAD file.
- Review tessellated geometry statistics before web export or a deeper CAD workflow.
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STEP viewer FAQ
Does STEP Inspector change CAD geometry?
No. It tessellates compatible geometry locally for preview and statistics; it does not edit the original CAD file.
Does the result replace a CAD validation tool?
No. This is a lightweight browser inspection. Use CAD software for precise topology, PMI, assemblies, and manufacturing validation.
Can I view a STEP or STP file from SolidWorks, Fusion 360, or FreeCAD?
Yes, for compatible exchange geometry. This is a local tessellated browser preview; use the CAD application for feature history, assemblies, tolerances, PMI, and engineering validation.
What file extension does STEP use?
This tool accepts the compatible STEP extension shown in the upload area. Use the dedicated format viewer when a file has a related extension or an application-specific variant.
Can I use this STEP viewer on a phone?
The page can be opened on mobile browsers, but a desktop browser is usually more practical for large files and detailed orbit, zoom, and inspection work.
Do I need to create an account to preview a STEP file?
Yes. Sign in first, then unlock this STEP tool once for $1.90. VIP members can also access the viewer.