Preview3D

Preview3D

STEP, STL, 3MF & G-code viewer

0 ratings
1 review
#51 in paid Graphics & Design
🔧 Utilities
🎨 Graphics & Design
$9.99

Details

Released
July 15, 2026
Updated
October 7, 2026
Preview3D screenshot #1 for iPhone
Preview3D screenshot #2 for iPhone
Preview3D screenshot #3 for iPhone
Preview3D screenshot #4 for iPhone
iphone
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About

View and inspect a wide range of 3D file formats natively on your iPhone and iPad. Supports CAD, mesh, and 3D printing files with detailed information and AR capabilities. Offline functionality ensures privacy and speed.

✓Native viewer for STEP, STL, 3MF, G-code, and more
✓Detailed model inspection (dimensions, volume, surface area)
✓Full-color 3MF rendering
✓Augmented Reality (AR) Quick Look integration
✓Offline functionality, no account or web uploads
✓Quick Look and 3D thumbnail support in Files app
✓Universal purchase for iPhone, iPad, and Mac
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What's New in Preview3D

1.4.2

October 7, 2026

Wireframe that looks the same every time • An STL opened straight into Wireframe drew every one of its triangles — a solid smear on a detailed model — and only switching to “Shaded with edges” and back gave the clean view. Wireframe now always shows the model's edges and outline, whatever came before.

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Charts

Top Paid

This app dropped -5 positions in Graphics & Design chart.

Last updated on October 28, 2026.

User reviews

I wanna submit a bug report...

but i can't... the "Support" button at the bottom of your site does nothing, it just tweaks out the curor in safari.

And getting in touch button on the "FAQ" overlay just sends me back to the top of the page default view (features). I'm not sure I like this all menus are just overlays on the same page... if it worked that would be different, but two strikes there already....

The bug is that when I open a second, or third STL model, the view buttons claim they pull the same/matching/current selections in the other open items, but they do not, it is just white on 5% gray wireframe and is useless view... you have to click on other views then back to the one you want...

Other than that, pretty good so far...
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Response from developer

Thank you, this is exactly the kind of report that helps, and you were right on all three counts. The Support link only tried to open a mail app, which does nothing in Safari without one, and "get in touch" in the FAQ went back to the home page. Both now lead to a support page with the address to copy and a form for sending a model that looks wrong: preview3d.xfanta.com/support. The wireframe bug was real too: a window opened straight into wireframe drew every triangle of an STL, and only a trip through "Shaded with edges" gave the clean view. It's fixed in 1.4.2, out now. Thanks for sticking with it.

Developer apps

FAQ

What 3D file formats does Preview3D support?

Preview3D supports a wide array of formats including STEP, STL, OBJ, PLY, glTF/GLB, USDZ, COLLADA, 3MF (with color), G-code, and many more via Assimp. It also handles formats like FBX, 3DS, and X3D.

Can I inspect detailed information about my 3D models with Preview3D?

Yes, Preview3D allows you to open an info panel to view bounding-box dimensions, volume, surface area, watertightness, and the model's structure (solids, faces, edges, triangles, vertices).

Does Preview3D work offline?

Absolutely. Preview3D is built for offline use, meaning everything runs on your device. You do not need an account or an internet connection to view your models.

How does Preview3D handle 3D printing files like G-code?

You can open your slicer's G-code or PrusaSlicer .bgcode files in Preview3D. You can orbit the print toolpath in 3D, view embedded preview images, and check print statistics like time, filament, and layer height.

Can I see my 3D models in Augmented Reality with Preview3D?

Yes, Preview3D integrates with AR Quick Look, allowing you to view any model in AR. You can place it on a surface in your room and walk around it to get a better sense of scale and detail.

What is the pricing for Preview3D?

Preview3D is a paid application, available for a one-time purchase of $9.99. This purchase covers the iPhone, iPad, and Mac versions of the app.

How often is Preview3D updated?

The latest version of Preview3D is 1.4.0, which was last updated on September 28, 2026. Updates typically bring new features, bug fixes, and support for the latest iOS versions.

Is Preview3D suitable for younger users?

Preview3D has an age rating of +4, making it suitable for younger users. The app's functionality is straightforward for viewing and inspecting 3D models.