3Diary is a marketplace for free and premium 3D models, bringing together digital assets for architects, designers, game developers, and other creative professionals and hobbyists. Its library spans furniture, decorations, toys and figures, fashion, food and drink, lighting, nature, vehicles, and other props. Featured assets include armchairs, sofas, cabinets, lamps, benches, and character models, with both high-poly and low-poly options to suit different projects and workflows.

Models are designed for uses such as architectural visualization, interior design, product rendering, animation, game development, and real-time applications including VR and AR. 3Diary emphasizes practical integration, offering one-click downloads and assets in industry-standard formats, including OBJ, FBX, 3DS Max, Blender, Maya, and STL. Visitors can browse by category or tags and access a growing collection of downloadable models. The site also provides information through its FAQ, privacy policy, and terms, along with an email contact and newsletter subscription for news, content, and updates.