Facet: STL & 3D Model Viewer

Facet opens the 3D files your iPhone and iPad can't — instantly. Tap an STL, 3MF, OBJ, glTF, GLB, PLY or OFF file in Files, Mail, Messages or AirDrop and it opens in a fast, beautiful viewer built on Metal. Models with millions of triangles load in a fraction of a second and spin smoothly at 120 Hz. BUILT FOR 3D PRINTING • Exact dimensions shown on screen, in mm, cm, m, inches or feet • Volume, surface area and estimated PLA weight • Watertight check that finds holes and non-manifold edges before you print • Multi-part and multi-color 3MF projects from Bambu Studio, PrusaSlicer, Orca and others INSPECT EVERY DETAIL • Section view: slice through any axis to see inside your model • Measure the distance between any two points, with X, Y and Z deltas • Solid, Solid + Edges, Wireframe, X-Ray and Point display styles • Front, top, side and isometric views, plus orthographic mode • Bounding box, floor grid with soft shadow, and turntable mode SEE FILES WITHOUT OPENING THE APP • Real 3D thumbnails for your models in the Files app • Interactive Quick Look previews in Files, Mail and Messages SUPPORTED FORMATS • STL (binary and ASCII) • 3MF (including multi-file projects, components and colors) • OBJ with MTL materials, textures and vertex colors • glTF 2.0 and GLB with materials, textures and vertex colors • PLY meshes and point clouds (ASCII and binary) • OFF SIMPLE AND PRIVATE Everything happens on your device. No accounts, no subscriptions, no ads, no tracking — and nothing you open is ever uploaded. Your models live in Files › On My iPhone › Facet, so they're always yours. Share a snapshot of any view, change the model color, switch between light and dark backgrounds, and get back to work.