OpenSCAD is a free, open-source software application used to create 3D models through programming rather than manual drawing. Users write code to precisely define shapes, dimensions, and transformations, making it especially popular among engineers and designers who prefer parametric, script-based modeling. Unlike traditional 3D modeling tools that rely on graphical interfaces, OpenSCAD provides full control over the modeling process through its scripting language, enabling highly customizable and reproducible designs. It is widely used for prototyping, 3D printing, and educational purposes.