CNC Model Viewer

CNC Model Viewer is a professional 3D CAD viewer built for engineers, machinists, and designers who need to inspect parts on the go. OPEN ANY CAD FILE • Supports STEP, IGES, STL, OBJ, glTF, GLB, PLY, VRML, and BREP formats • Import files from the Files app, email, or drag and drop • Browse and organize imported models with the built-in file explorer MEASURE & INSPECT • Tap faces and edges to measure diameters, distances, and dimensions • Automatic thread detection — identifies metric, imperial, and NPT threads • Toggle between millimeters and inches • Navigate assembly hierarchies with the part tree view ANNOTATE • Place labeled markers directly on 3D surfaces • Edit and manage annotations per model • Annotations persist across sessions CUSTOMIZE YOUR VIEW • Wireframe, shaded, and edge display modes • Customizable part, edge, and background colors • Dark mode support • 120Hz ProMotion rendering on supported devices • Screenshot and share model views FULLY OFFLINE • No account required, no internet connection needed • All processing happens on your device • Your files stay on your device