Fqutils provides a basic set of bioinformatics command line tools for working with sequence data in FASTQ format. It complements Greg Hannon's fine Fastx Toolkit suite. One characteristic of Fqutils is that it correctly handles the full FASTQ format as described by the published standard, which specifically allows multi-line sequence and quality score information per record. Fqutils is intended to be useful as part of the early portions of post-sequencing pipelines and quality assessment processes.