Happy3D is a creative 3D modeling and printing software developed by Zhejiang Flashforge 3D Technology Co.Ltd. It is aimed at students and 3D printing enthusiasts, providing a user-friendly and enjoyable experience for beginners in 3D printing. The software allows users to easily create 3D models by designing simple 2D outlines, rotating, stretching, and inflating them. It also supports model modifications and direct 3D printing via WiFi connection to printers.

Happy3D offers a range of features including freehand model drawing, text input for 3D text creation, background image outlining, model editing options such as merging, intersecting, subtracting, extruding, copying, mirroring, coloring, and deformation. Users can also manipulate models by moving, rotating, and scaling them, as well as observe models from various angles. Additionally, the software includes a model library with standard, educational, architectural, creative gift, and toy models, allowing users to directly print or customize them. It also supports importing and exporting STL files.