Welcome to The Santos Lab implementation of FaBox (Villesen (2007), Molecular Ecology Notes 7:965-968). FaBox is a collection of simple and intuitive web services that enable biologists to quickly perform typical task with sequence data. The services makes it easy to extract, edit, and replace sequence headers and join or divide data sets based on header information. Other services include collapsing a set of sequences into haplotypes and automated formatting of input files for a number of population genetics and phylogenetic programs, such as Arlequin, TCS and MrBayes. The toolbox is expected to grow on the basis of requests for particular services and converters in the future.