PrintPrep — in-browser 3D print model normalization

Turn AI-generated GLB into slicer-ready STL/3MF without the file leaving the browser

Problem

AI-generated 3D models come out as GLB with PBR textures—pretty to spin in a browser, but Bambu Studio, PrusaSlicer, and Cura won't touch them. It's not just a rename: glTF mandates Y-up and meters, while STL carries neither axes nor units. Skip that and the model lies on its side and comes out 1000x too small. Online converters also demand uploads and cap free tiers at 5–25 MB.

Solution

A pure browser-side normalization tool: parse GLB/OBJ, fix orientation, convert units to millimeters, and export slicer-friendly STL/3MF/OBJ. Everything runs in the tab with no upload and no server-side size cap, suitable for large models and privacy-minded users.

Users

Makers printing AI-generated models, 3D printing hobbyists, and small print-on-demand services

MVP

In-browser GLB/OBJ parsing; automatic axis and unit normalization to millimeters; export STL/3MF/OBJ; show dimensions and origin check; no upload and support for large files.

Revenue

Free tier capped by file size or resolution; Pro one-time purchase to unlock large files and batch processing.

Why now

AI-generated 3D content is rising while slicers won't natively accept GLB soon; WASM makes in-browser geometry processing fast enough for an indie dev to build trust quickly.