3D Lab Viewer – View Step, STL, 3MF Files in the Browser

Show HN: 3D Lab Viewer – View Step, STL, 3MF Files in the Browser

3D Lab Viewer – View Step, STL, 3MF Files in the Browser is a business in show hn launch.

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I saw Microsoft is deprecating 3D Viewer and removing it from Store in July. I always had trouble checking STEP files quickly - you have to open a slicer or full CAD software just to look at a part. So I built a viewer.https://viewer.3dlab.id - drag and drop a file, it renders in browser. No signup, no install.Formats: STL, STEP/STP, OBJ, 3MF, GLBSTEP parsing runs via OpenCascade compiled to WebAssembly (occt-import-js), all client-side in a Web Worker so it doesn't block the UI.Stack: React, TypeScript, Three.js, Vite. Backend for sharing is Cloudflare Pages Functions + D1 + R2. There's also a Windows desktop version built with Tauri, but not released yet.Other features: - multiple files in

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Website: viewer.3dlab.id