Ready for upload.
Files stay in your browser for preview.STP, STEP tool
STP Viewer Online
Unlock STEP tools once for $1.90 to preview compatible STP CAD files locally without desktop CAD software.
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
Use this online STP viewer to open a compatible STP file, inspect its geometry, and take a screenshot without installing desktop software.
STP files from SolidWorks, Fusion 360, and FreeCAD
STP is a common STEP extension. Use a current desktop browser for compatible geometry exported from SolidWorks, Fusion 360, FreeCAD, CATIA, Creo, or similar CAD workflows; the result is a tessellated preview rather than editable CAD history.
How to use this STP viewer
- Sign in and unlock this format once.
- Choose a compatible STP file from your computer.
- Rotate, zoom, switch wireframe or background, and capture the result.
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STP viewer FAQ
How can I open a STP file online?
Sign in, unlock the STP tool once, then choose a compatible file. The preview runs in your browser.
Are my files uploaded to a server?
No. Compatible files are processed locally in your browser for this preview or conversion workflow.
Is this a subscription?
No. Each format is a $1.90 one-time unlock. VIP members can also access the tool.
Can I open an STP file from SolidWorks or Fusion 360?
Yes, for compatible geometry. Use your CAD software when you need exact CAD topology, feature history, assemblies, tolerances, or manufacturing validation.
What file extension does STP use?
This tool accepts the compatible STP 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 STP 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 STP file?
Yes. Sign in first, then unlock this STP tool once for $1.90. VIP members can also access the viewer.