Free Online
3D Model Viewer
Upload STL or STEP files, preview in your browser, and create a temporary share link. No signup required.
Drag & drop your 3D model hereTap to upload your 3D model
or browse files from your computer
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Upload an STL or STEP file above to view it in high-quality 3D and generate a temporary share link.
Trusted by top engineering teams
Why use Partwork's 3D Viewer?
A quick way to inspect CAD files and send temporary viewer links to your team without heavy CAD tooling.
Secure Temporary Sharing
Generate an expiring share URL for quick reviews without creating an account. Links are time-bound for safer collaboration.
Fast STEP Processing
Upload STEP or STL files and preview them in 3D quickly with optimized server-side conversion and browser rendering.
Interactive Inspection
Rotate, zoom, and pan to inspect every detail of your design with smooth, intuitive controls.
Totally Free
No subscriptions, no watermarks, and no limits on file size or usage. Open as many models as you need.
No Installation
Works directly in any modern browser. No plugins, heavy software, or complex installations required.
Mobile Ready
Review designs on the factory floor or at client meetings. Our touch-optimized viewer works perfectly on any smartphone or tablet.
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