JMV is a molecular viewer written in Java and Java3D. JMV is designed to be an easy-to-use platform neutral molecular visualization tool, which can be used standalone or integrated into other programs. JMV provides several molecular representations, multiple coloring styles, lighting controls, and stereoscopic rendering capabilities. JMV loads PDB format molecular structure files over the web, from the RCSB protein databank, from BioCoRE filesystems, and from local filesystems.