html-pretty

html-pretty filters its HTML input from stdin, or from one or more named files given on the command line, and prettyprints it to stdout.

The goal of a prettyprinter is to recognize all legal inputs, and produce output that is indented to reflect the structure, and in which line lengths have been restricted for improved readability. Irregularities in coding practice, and outright errors, are more likely to be detected in the prettyprinted output, than in the input.