WenJun Zhang School of Life Sciences, Sun Yat-sen University, Guangzhou 510275, China; International Academy of Ecology and Environmental Sciences, Hong Kong Selforganizology ISSN 2410-0080 http://www.iaees.org/publications/journals/selforganizology/online-version.asp 2028 15 3-4 113 195 International Academy of Ecology and Environmental Sciences Hong Kong 31 July 2026 10 August 2026 1 December 2028 3D visualization browser-based software data conversion molecular visualization mesh rendering volumetric data CAD data JavaScript client-side computing scientific visualization 3D-Visualizer 2.0, developed on the basis of the earlier 3D-Visualizer, is a universal browser-based tool for viewing, exploring, and converting many kinds of 3D structure data without installing specialized software. Built as a self-contained HTML/CSS/JavaScript application, it runs entirely on the client side and can be used offline after loading. The tool is designed to provide a lightweight solution for rapid inspection of scientific, molecular, geometrical, and volumetric datasets. The program supports a wide range of input formats. These include common 3D geometry and mesh formats such as OBJ, STL, PLY, OFF, VTK, 3DS, FBX, glTF/GLB, DAE, X3D, 3MF, and DXF; molecular formats such as XYZ, PDB, MOL, SDF, MOL2, CML, and CUBE; and volumetric or CAD-related formats such as MRC/CCP4/MAP, STEP/STP, and IGES/IGS. According to the input type, structures can be displayed as wireframes, flat-shaded surfaces, point clouds, or ball-and-stick molecular models. The system also supports export to multiple widely used formats, enabling practical cross-format conversion for reuse in other software environments. 3D-Visualizer 2.0 combines file parsers, format writers, a custom 3D affine transformation engine, and a 2D Canvas renderer in a single compact platform. Molecular visualization includes automatic bond detection based on atomic distances and covalent radii, together with standard element coloring. Volumetric datasets can be previewed through point-cloud extraction at a selected iso level, allowing quick examination of density distributions. Interactive operations include rotation, zooming, panning, resetting the view, saving PNG images, and adjusting display parameters such as canvas size, zoom scale, bond tolerance, ball size, iso threshold, and point limits. Because it is portable, easy to use, and independent of operating system and installation environment, 3D-Visualizer 2.0 is suitable for education, preliminary data inspection, lightweight scientific visualization, and convenient 3D format conversion in both online and offline settings. http://www.iaees.org/publications/journals/selforganizology/articles/2028-15(3-4)/3D-Visualizer2.0.pdf