bib­clean – A BibTeX pret­typrinter, ver­i­fier, etc

Bib­clean is a portable pro­gram (writ­ten in C) that will pretty-print, syn­tax check, and gen­er­ally sort out a BibTeX database file. The stan­dard­ised for­mat of bib­clean's out­put im­proves the chances of sim­ple fil­ters such as bibex­tract, bibindex, biblook, bib­sort (and so on) op­er­at­ing cor­rectly.