Question 1

Which 3D file formats are supported?

Accepted Answer

This viewer supports GLB (binary glTF), GLTF (.gltf with embedded or separate resources), STL (binary and ASCII, popular for 3D printing), and OBJ (Wavefront). Files are parsed in the browser using Three.js loaders.

Question 2

Is my 3D model uploaded to a server?

Accepted Answer

No. Your model is read directly from disk into the browser via the File API and rendered locally with WebGL. Nothing is uploaded, stored, or transmitted anywhere.

Question 3

Can I view very large 3D models?

Accepted Answer

Performance depends on your device's GPU and memory. Models with tens of millions of polygons may be slow. For large files, reduce polygon count in your 3D editor first.

Question 4

Does this viewer need an internet connection?

Accepted Answer

It needs to load the Three.js library once from a CDN. After that, opening and viewing local 3D files works offline within the same browser session.