STL Viewer
Upload, orbit, zoom, and inspect .STL models directly in your browser.
STL Viewer Features
Responsive Rendering
ResizeObserver keeps the canvas adaptive and the camera fit on window changes.
Geometry Focused
Ideal for quick inspection of triangle meshes and surface topology.
Clean Controls
Toggle grid and wireframe, and choose colors with high-contrast UI.
Tips for Viewing STL Files
- Unitless: STL is unitless. Visual scale depends on your slicer settings (commonly mm).
- Topology: Use wireframe to quickly spot non-manifold edges and mesh anomalies.
- Performance: Very dense meshes take longer to render; reduce triangle count if necessary.
- Binary vs ASCII: Binary files are smaller and load faster than ASCII STL.
Troubleshooting
Drag & Drop Rejected
Ensure the file has the .stl extension. Other formats are not supported on this page.
Controls Not Responding
Click the canvas to focus, then use mouse buttons and the scroll wheel for navigation.