The ArthropodEST pipeline is a web-accessible tool developed at Kansas State University that allows users to analyze expressed sequence tags (ESTs). It cleans input sequences, screens for contaminants, clusters ESTs into contigs through assembly, and predicts open reading frames and signal peptides. Users can access analysis results and a summary report through a unique URL sent to their email. The pipeline utilizes freely available bioinformatics software and provides more options for EST analysis than other existing online tools.