I’ve been 3D printing for a few years now — starting out doing it for fun, for friends, and for charitable causes. Somewhere along the way, I got frustrated with the existing tools for turning artwork into multi-color, multi-layer STL files. Most were either too complicated, too limited, or just didn’t work the way makers actually think.

So I built STLToolbox — a free, browser-based toolkit that does one thing well: turns images into clean, print-ready STL files, without needing any software installed.

Every tool here started as something I needed myself. If it saves you time or helps you make something you’re proud of, that’s the whole point.