Open3D: STL & 3D Model Viewer

Name: Open3D: STL & 3D Model Viewer
Rating: 4.8 (22 reviews)
Author: Rajesh Konatala

View STL, GLB, STEP, DXF & OBJ

Free · Designed for iPad. Not verified for macOS.

22 Ratings
Age Rating

4+
Years
Category

Graphics & Design
Developer

Rajesh Konatala
Language

EN
English
Size

80.6
MB

Open3D Viewer is the fastest free 3D model viewer for STL, GLB, OBJ, FBX, STEP, DXF, USDZ, PLY, 3MF, GLTF, IGES, DAE and 3DS files. Open any 3D file in seconds, view it in AR with Apple Quick Look, and check it for 3D printing — no account, no sign-up, no cloud upload. Your files never leave your iPhone or iPad. Whether you're a 3D-printing hobbyist checking an STL before slicing, a 3D artist previewing a GLB or FBX, or a CAD user opening a STEP or DXF, Open3D Viewer opens it instantly — without the paywalls and login screens other 3D viewers force on you. SUPPORTED 3D FILE FORMATS • Mesh: STL, GLB, GLTF, OBJ, PLY, 3MF, FBX, DAE, 3DS, USDZ • CAD: STEP / STP, IGES / IGS, DXF Export & convert Turn OBJ, PLY, 3MF, FBX, DAE, 3DS and more into STL for 3D printing or GLB for sharing. Files save straight to your Downloads folder — no extra apps, no online converter, everything happens on-device. A 3D VIEWER THAT DOES THE BASICS RIGHT • Open files from Files, email, downloads, or any "Open with" menu • Smooth orbit, pan and zoom touch controls • Render modes: solid, wireframe, X-ray, textured, matte • Wireframe overlay — see the geometry on top of the rendered surface • Preset camera views (front, side, top, perspective) • Light and dark themes • 5 background colours + 6 HDRI lighting environments (studio, sunset, dawn, dusk, dark, white) • Play built-in animations • View 3D models in AR via Apple Quick Look (USDZ) • Capture a screenshot or a rotating GIF and share it • Recent files with auto-generated thumbnails • Full model specs: triangle count, vertices, materials, textures, bounding box BUILT FOR 3D PRINTING • Print-readiness check: manifold / watertight detection, overhangs, wall thickness • Bed-fit check for popular printers (Bambu A1, Prusa MK4, Ender 3, Bambu X1C) • Rough weight, filament length and cost estimates • Measure distances on the model • Cross-section / clipping plane to inspect interiors • Scale and resize tool • Convert and export between GLB and STL LOCALIZED The interface automatically follows your device language. Currently available in English, German, Spanish, French, Portuguese, Hindi, Japanese, and Chinese. NO ACCOUNT. NO CLOUD. NO NONSENSE. • No sign-up, ever • 100% on-device. Works offline. • We never read, scan, or upload your files • We don't track which files you open The STL viewer and GLB viewer that makers, 3D artists and engineers actually want: clean, fast, and local. Measurements and print-readiness figures are estimates, not a replacement for a slicer or proper measuring tools. See the in-app Disclaimer. Open3D Viewer is an independent app and is not affiliated with the Open3D open-source library at open3d.org. All trademarks belong to their respective owners. Privacy policy: https://open3d.app/privacy.html

Ratings & Reviews

4.8

out of 5

22 Ratings

Great stuff
Aug 9
sanspantalones
Initial impressions are fantastic. Two small pieces of feedback: there have been a couple .3MF that have been unable to render (but have also printed successfully). And a feature request to be able to view flat 3D files like DWG.

Developer Response
Thanks for the 5 stars!For the .3MF files that fail — mind mailing one to support@open3d.app? I'll trace exactly why and patch it.DWG is closed-format so it needs a bit of plumbing, but I'm adding auto-DWG support in the next Windows update (v1.1.4) via ODA File Converter. Coming soon.
Great stuff
Aug 9
sanspantalones

Initial impressions are fantastic. Two small pieces of feedback: there have been a couple .3MF that have been unable to render (but have also printed successfully). And a feature request to be able to view flat 3D files like DWG.
Developer Response Aug 11
Thanks for the 5 stars!For the .3MF files that fail — mind mailing one to support@open3d.app? I'll trace exactly why and patch it.DWG is closed-format so it needs a bit of plumbing, but I'm adding auto-DWG support in the next Windows update (v1.1.4) via ODA File Converter. Coming soon.
Best multi 3D file viewer
Sep 12
Authentyc
Very impressed with the simplicity, yet great features. I just wish you could also convert files, lines from OBJ to STL for example. Highly recommend!

Developer Response
Thanks Authentyc — really glad you're enjoying it. OBJ-to-STL conversion is on the way; the engine already does it, we just need to wire up the button. Coming in the next update
Best multi 3D file viewer
Sep 12
Authentyc

Very impressed with the simplicity, yet great features. I just wish you could also convert files, lines from OBJ to STL for example. Highly recommend!
Developer Response Sep 15
Thanks Authentyc — really glad you're enjoying it. OBJ-to-STL conversion is on the way; the engine already does it, we just need to wire up the button. Coming in the next update
Excellent
Oct 8
anon41209
My only wish is that it supported loading multiple models in, like for a scene.

Developer Response
Thank you for your feedback. I will add multi file/scene option soon
Excellent
Oct 8
anon41209

My only wish is that it supported loading multiple models in, like for a scene.
Developer Response 4d ago
Thank you for your feedback. I will add multi file/scene option soon
A Hidden Gem
Oct 2
Oh Hammy
One of the best STL AND 3D model viewing apps available. Consistent updates, great usability and easy to recommend

Developer Response
Thank you. If you ever feel like if a feature is missing or not working properly, please write at support@open3d.app and i will fix it straight away
A Hidden Gem
Oct 2
Oh Hammy

One of the best STL AND 3D model viewing apps available. Consistent updates, great usability and easy to recommend
Developer Response Oct 4
Thank you. If you ever feel like if a feature is missing or not working properly, please write at support@open3d.app and i will fix it straight away

Export & convert Turn OBJ, PLY, 3MF, FBX, DAE, 3DS and more into STL for 3D printing or GLB for sharing. Files save straight to your Downloads folder — no extra apps, no online converter, everything happens on-device.

Version 1.4.0 1d ago

Data Used to Track You

The following data may be used to track you across apps and websites owned by other companies:
- Location
- Identifiers
- Usage Data
Data Not Linked to You

The following data may be collected but it is not linked to your identity:
- Location
- Identifiers
- Usage Data
- Diagnostics

Privacy practices may vary, for example, based on the features you use or your age. Learn More

Accessibility

Information

Seller: Rajesh Konatala
Size: 80.6 MB
Category: Graphics & Design
Compatibility: Requires iOS 15.0 or later.

iPhone
Requires iOS 15.0 or later.

iPad
Requires iPadOS 15.0 or later.

iPod touch
Requires iOS 15.0 or later.

Mac
Requires macOS 12.0 or later and a Mac with Apple M1 chip or later.

Apple Vision
Requires visionOS 1.0 or later.
Languages: English
Age Rating: 4+

4+

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