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Open3D: STL & 3D Model Viewer

Open3D: STL & 3D Model Viewer

View STL, GLB, STEP, DXF & OBJ

18 ratings
4 reviews
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Details

Released
May 28, 2026
Updated
October 7, 2026

Features

Developer

Rajesh Konatala
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About

Instantly view and inspect a wide range of 3D file formats directly on your device. Offers AR viewing, 3D printing readiness checks, and detailed model specifications without requiring an account or cloud upload.

✓Supports over 15 3D file formats
✓Augmented Reality (AR) viewing via Apple Quick Look
✓3D printing readiness checks (manifold, overhangs, wall thickness)
✓On-device processing, no cloud upload required
✓Detailed model specifications (triangle count, bounding box)
✓Export between GLB and STL formats
✓Offline functionality
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What's New in Open3D

1.3.7

October 7, 2026

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.

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User reviews

Most RecentHighest RatedLowest Rated

A Hidden Gem

One of the best STL AND 3D model viewing apps available. Consistent updates, great usability and easy to recommend
OHOh Hammy

Response from developer

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

Best multi 3D file viewer

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!
AAuthentyc

Response from developer

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

Great stuff

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.
Ssanspantalones

Response from developer

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.

Looks good

Just getting started but looking good so far!
RORoku owner

Response from developer

Thank you !

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FAQ

What 3D file formats does Open3D support?

Open3D supports a comprehensive list of mesh formats including STL, GLB, GLTF, OBJ, PLY, 3MF, FBX, DAE, 3DS, and USDZ. It also handles CAD formats like STEP/STP, IGES/IGS, and DXF.

Can I view 3D models in Augmented Reality with Open3D?

Yes, Open3D allows you to view 3D models in AR using Apple Quick Look, provided the model is in a compatible format like USDZ. This feature lets you place and interact with your 3D models in your real-world environment.

Does Open3D have ads?

Yes, Open3D contains advertisements. As a free application, it utilizes ads to support its development and maintenance.

Is Open3D suitable for 3D printing preparation?

Open3D includes several features beneficial for 3D printing, such as print-readiness checks for manifold geometry and wall thickness, as well as bed-fit estimations for popular printers. It also offers tools for measuring distances and inspecting model interiors.

Does Open3D require an internet connection or account?

No, Open3D is designed for 100% on-device operation. It works offline and does not require any account sign-up or cloud upload, ensuring your files remain private.

How often is Open3D updated?

The latest version of Open3D was released on July 12, 2026, indicating a relatively recent update. Updates typically address bug fixes, performance improvements, and potentially new features.

What are the basic viewing controls in Open3D?

Open3D offers intuitive touch controls for smooth orbit, pan, and zoom. It also provides preset camera views and various render modes like solid, wireframe, X-ray, and textured.

What is the age rating for Open3D?

Open3D has an age rating of 4+, making it suitable for a wide range of users, including younger individuals interested in exploring 3D models.