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Files stay in your browser for preview.STEP, STP tool
STEP Viewer Online
Unlock STEP or STP upload once for $1.90. Compatible CAD geometry is converted locally in your browser for inspection and screenshots.
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
Open STEP or STP CAD files online for product-design review. Compatible CAD geometry is tessellated locally in the browser, giving engineers and collaborators a quick way to inspect a model without a native CAD viewer.
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 Viewer once.
- Upload a .step or .stp CAD file.
- Inspect the tessellated preview or export compatible geometry to GLB for web sharing.
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STEP viewer FAQ
How do I open a STEP or STP file online?
Unlock STEP Viewer once and select the .step or .stp file. Compatible CAD geometry is tessellated in the browser for inspection.
Is STEP the same as STP?
They are commonly used extensions for the ISO 10303 STEP CAD exchange format.
Can I convert STEP to GLB?
Yes. Use STEP to GLB Converter to create a web-ready tessellated model from compatible CAD geometry.
Can I open STEP files on Windows or Mac?
Yes. Use a current browser on Windows or macOS to preview compatible STEP or STP geometry without downloading a desktop CAD viewer.
Does this show the original CAD feature tree?
No. The viewer displays a tessellated preview; parametric history and editing require a CAD application.
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.