Windows. Instructions for the Do-it-yourself Offline HTML Validator using SP.
Windows and Unix. Object-oriented toolkit for SGML parsing and entity management. Can validate any version of HTML for which a DTD is available. Free Software.
Perl script which corrects incompatible HTML generated by Microsoft applications.
SWAN: SubWeb Analyzer
Unix. Generates statistics and finds inconistencies in a subweb (web site).
Windows. Includes validator, image scanner, meta tag manager, find and replace tool, tag pair fixer, and an HTML to text converter. Commercial software; 30-day demo.
A Real Validator
Windows. Based on an SGML parser. Shareware.
Unix and Windows. Lint and link checker. Commercial software; free trial. Also online checking.
Unix, Windows, MacOS, and others. Validator fixes errors in HTML and XHTML. Converts HTML to XHTML. Free Software.
CSE HTML Validator
Windows. HTML, XHTML, and CSS validator. Also checks accessibility, links, and spelling. Commercial pro version and free lite version.
More Validators and Lints Sites