View, measure, and convert 3D models offline on your iPhone or iPad. Supports multiple file formats and offers AR viewing at real size. Share models as GIFs or videos.
1.8.0
November 4, 2026
• Will it print? One tap checks holes, bed fit, supports, the base, thin walls and loose parts. Share the result as an image. • Open G-code and sliced 3MF files to see print time, filament and layers. • The print estimate now works layer by layer, for a closer time. • Open a model straight from a Printables page or a file link. • Now in 27 languages. Your emails make this app better every day — thank you!
MoreHi again. We appreciate your suggestion. As of version 1.8.3, we've officially added a one time paid option to remove ads. Thank you for helping shape this update. You can check it out by updating the app.
You can open an STL file by tapping 'Open file' within STL Viewer, or by selecting STL Viewer from the 'Open With' or 'Share' options in the Files app.
Yes, STL Viewer is free. There are no subscriptions or in-app purchases. A small banner ad may appear after a model is ready for viewing.
Yes, STL Viewer works fully offline. Opening, measuring, AR viewing, and exporting all function on the device without requiring an internet connection.
Yes, STL Viewer can open 3MF files from these slicers. The geometry will open with its real-world units, allowing you to check the part before printing.
STL Viewer supports a wide range of formats including STL, 3MF, OBJ, PLY, OFF, 3DS, GLB, and glTF.
Yes, STL Viewer contains advertisements. At most, one small banner ad will appear after a model is ready for viewing.
STL Viewer allows you to place your 3D models on a real surface using AR Quick Look, enabling you to see their true size before printing. The camera is only used when AR is active.
You can measure distances between points in millimeters, view dimensions, volume, surface area, and triangle count. It also provides print estimates for weight, filament length, time, and cost.
