The Free On-line Dictionary of Computing (30 December 2018):

weblint

    (After lint) A syntax checker and style
   checker for HTML.  Weblint is a Perl script which does for
   HTML pages what the traditional lint picks does for C
   programs.

   Version: 1.020 (1997-12-07).

   (http://cre.canon.co.uk/~neilb/weblint/).

   (1997-12-07)