Allows visual comparison of genome data. SynView is a light-weight, interactive and customizable comparative genomic visualization tool based on the GBrowse framework. The software can read mapping data and allow user to compare multiple genomes at several scales. It was developed for use in the CryptoDB project and has since been adopted by the PlasmoDB project to compare several genomes that are more divergent than Cryptosporidium. SynView can be integrated with other projects.