STL File Viewer Pro
iPhone · iPad · Mac · Vision Pro
The STL Viewer for iPhone & iPad
Open STL files on your phone in seconds. STL File Viewer Pro loads 3D models straight from Files, Mail and AirDrop. Spin them with your fingers, measure between points and estimate print weight before you hit print.
Free download · No account · iOS 16.6+
How to Open an STL File on iPhone
Add a dedicated STL viewer in under a minute and every STL file you receive opens with a tap, in full interactive 3D.
- 01
Download STL File Viewer Pro
Get the free app from the App Store. It runs on iPhone and iPad, plus Apple silicon Macs and Apple Vision Pro.
- 02
Tap your STL file
Open the file from the Files app, a Mail attachment, AirDrop or any app that can share a file, and choose STL File Viewer Pro.
- 03
Inspect it in 3D
Drag to rotate, pinch to zoom and pan with two fingers. Measure between points or estimate the print weight before you send it to the printer.
Open STL files from
Wherever they land
- +Files & iCloud Drive
- +Mail attachments
- +AirDrop
- +Share sheet from other apps
STL File Viewer Pro: Built for Your Phone
Not a desktop tool squeezed onto a small screen. Every control in STL File Viewer Pro is designed for fingers.
Made for touch
Measure distances
Estimate print weight
Handles big files
Materials, grid & lighting
Light & dark mode
STL File Viewer Pro on iPhone, iPad, Mac & Vision Pro
One download of STL File Viewer Pro lets you view STL files on every Apple device you own.
STL viewer for iPhone
A pocket STL viewer for checking downloads, client files and print jobs wherever you are.
STL viewer for iPad
A bigger canvas for design reviews, showing parts to clients and inspecting fine detail.
STL viewer for Mac
The same app on Macs with Apple silicon (M1 or later), with no extra download.
STL viewer for Apple Vision Pro
Open the same STL files on Apple Vision Pro.
Who Views STL Files on iPhone?
Anyone who needs to check a 3D model without walking back to a computer.
3D printing on the go
Found a model on your phone? Check it before it ever reaches the slicer.
- +Preview downloads before printing
- +Check size with measurements
- +Estimate weight in different materials
Engineers & product designers
Review parts from the shop floor, a meeting or the train without opening CAD.
- +Open STL files from email
- +Show prototypes on iPad
- +Quick dimensional checks
Students & educators
Pass a model around the classroom on an iPad instead of crowding around one monitor.
- +No accounts to set up
- +Easy to pass around on iPad
- +Light and dark modes
No App? View STL Files Online
Our free online STL viewer works in Safari on iPhone and iPad and in any desktop browser. It also opens OBJ and PLY files. Your model is processed on your device and never uploaded.
- STL · OBJ · PLY
- Nothing uploaded
- Any browser
More 3D Viewers & Converters
Free browser tools for the other 3D formats you'll run into.
STL Viewer for iPhone: FAQ
Common questions about viewing STL files on iPhone and iPad.
Put STL File Viewer Pro in Your Pocket
The STL viewer for iPhone and iPad, free on the App Store. Open your first STL file in less time than it takes to walk to your desk.