Last week I released SupportSage, a CLI tool that analyzes STL geometry and generates optimized support structures. The response was great, but there was a recurring question: "Can I try it without installing anything?"

So I built a browser-based version . Drop an STL file into the viewport and see the overhang analysis immediately — color-coded, interactive, and fully client-side.

What It Does

The web demo takes your STL file and:

Parses it entirely in your browser — binary and ASCII STL both supported

Computes face normals and classifies each face by overhang severity

Color-codes the model so you can see at a glance where supports are needed:

🔴 Red = Critical overhang (>120° from vertical)

🟠 Orange = Moderate (70-120°)

🟡 Yellow = Borderline (45-70°)

🟢 Green = Safe (no support needed)

Runs island detection — finds disconnected overhang regions

Estimates material savings vs traditional uniform support

Lets you inspect from any angle — rotate, pan, zoom

All of this happens in your browser.…