A web server for predicting and designing of quorum sensing peptides. QSPpred web server hosts SVM based predictive models i.e. QSPepPred, QSPepDesign and QSPepMap utilizing compositional, binary, physicochemical features and their hybrids. QSPepPred predicts the extent of an input peptide (fasta or multifasta format) as QSP or non-QSP. QSPepDesign can design all possible single position mutants of a given peptide sequence and subsequently predict their QS status. QSPepMap helps to identify potential regions in protein, which may function as QSPs. In addition, it also includes various analysis tools like QSMotifScan, MutGen, PhysicoProp and ProtFrag.