ImageToSTL.online

ImageToSTL.online is a specialized, privacy-focused web application that converts 2D images into 3D printable STL files entirely within the user's browser. Its core positioning is to provide a fast, free, and accessible tool for makers, hobbyists, and professionals to create tangible objects from digital images. The target audience includes 3D printing hobbyists, crafters, educators, small business owners, and designers who need practical, printable models for gifts, merchandise, or prototyping. Its core features revolve around four deterministic conversion modes—Photo Relief, Logo Extrude, Lithophane, and Keychain—each transforming image data (brightness) into heightmaps or silhouettes. Content is centered on practical, print-ready outputs like keychains, lithophanes, and embossed plaques. User experience is paramount, with a live, interactive 3D preview that rebuilds in under a second as parameters are adjusted. Key technical features include 100% in-browser processing for privacy (no upload for free modes), support for multiple image formats (PNG, JPG, WebP, SVG, GIF, BMP), and the generation of watertight, manifold STL meshes scaled in real millimeters for reliable slicing. An optional paid 'AI Full 3D' mode uses server-side AI to generate full 360-degree colored models from a single photo.