3D Kit: STL Viewer

Open, explore, and inspect 3D models on your iPhone or iPad. 3D Kit is a fast, intuitive viewer built for makers, designers, engineers, and anyone who works with 3D files.

Drop in an STL, OBJ, USDZ, or 3MF file and see it rendered instantly. Orbit around your model with smooth turntable controls, zoom in to inspect fine details, and get a complete breakdown — triangle count, vertex count, dimensions, bounding box, file size, volume, and surface area.


BUILT FOR 3D PRINTING

Choose from popular printer bed presets or enter custom dimensions to see exactly how your model fits on the build plate. A floor grid gives you spatial reference, and real-time measurement overlays show width, height, and depth in millimeters — so you can verify scale before you slice.

Whether you are checking a downloaded file or reviewing your own design exports, 3D Kit gives you a quick, reliable way to preview models without launching a full slicer or CAD application.


SEE YOUR MODEL IN THE REAL WORLD

Place any 3D model into your physical environment using augmented reality. Point your camera at a flat surface, tap to place, and walk around your model as if it were sitting right in front of you. AR mode is perfect for checking the real-world size of a print, showing a design to someone who does not use CAD software, or seeing how a model looks on your desk before committing to a print.

Measurements work in AR too, so you can verify dimensions while viewing the model in context.


MAKE IT YOURS

Customize every aspect of the viewing experience. Change the object color, floor color, sky color, grid color, grid line width, and ruler line color. Choose from camera presets — front, back, left, right, top, bottom, and isometric — or orbit freely to find the perfect angle.

All appearance settings persist across sessions.


CAPTURE AND SHARE

Take high-resolution screenshots or record smooth video walkthroughs. Export to your photo library, save to Files, or share directly to any app. Video recording works in both the standard viewport and AR mode.


YOUR MODEL LIBRARY

Import files from the Files app, AirDrop, email attachments, or any app that shares 3D files. 3D Kit organizes your models in a built-in library with quick access to recent files. Rename, delete, and manage your collection without leaving the app.

Browse the included sample models to explore what 3D Kit can do