STL Viewer

Preview STL 3D printing files with interactive rotation and zoom. Inspect mesh statistics like triangle count, dimensions, and volume.

Drop STL file here or click to browse

.stl 3D model files

Drag to rotate • Scroll to zoom • Right-drag to pan

Model Info

No file loaded

Dimensions

Display

Model Color

Show Wireframe

OBJ Viewer - View 3D Models in Browser

View all Cad viewers →

Frequently Asked Questions

STL (Stereolithography) is the standard file format for 3D printing. It represents 3D surfaces as a mesh of triangular facets, widely used by slicers and 3D printers.

Both ASCII and binary STL formats are supported. Binary STL is more common as it's more compact. The viewer auto-detects the format.

Yes. Click and drag to rotate, scroll to zoom, and right-click drag to pan. Touch gestures work on mobile devices.

Triangle count, vertex count, bounding box dimensions, estimated volume, and surface area. Useful for 3D printing preparation.

No. All rendering happens locally in your browser using WebGL. Your STL files never leave your device.

Depends on your device's GPU memory. Most models under 50MB render well. Very complex models (millions of triangles) may be slow.

The viewer shows basic mesh info. For manifold checking, wall thickness, and other print validation, use dedicated slicer software.

Some STL files have inverted normals. The viewer shows both sides, but the darker interior indicates flipped faces that may cause printing issues.

Standard STL is monochrome. The viewer uses a default gray material. For colored models, formats like 3MF or OBJ with materials are needed.

The bounding box dimensions are shown in the model's native units (usually millimeters). For precise measurements, use CAD software.

Related Tools