The nfo programming language is used in the graphic file format from the transport tycoon deluxe, ttdpatch and openttd games.

it takes as input any number of files that contain something that vaguely resembles valid nfo, and produces, to the best of its ability, encodable nfo files, one for each input file.

it also detects and warns about some common mistakes made in nfo coding. a pretty-printer is also included.