Peak-motifs is a computational pipeline that discovers motifs in peak sequences, compares them with databases, exports putative binding sites for visualization in the UCSC genome browser and generates an extensive report suited for both naive and expert users. It relies on time- and memory-efficient algorithms enabling the treatment of several thousand peaks within minutes. Peak-motifs not only finds motifs associated the ChiPed factor, but usually further returns motifs potentially bound by cofactors.