No specific info about version 12.0. Please visit the main page of Total Validator Basic on Software Informer.
Free CSS Toolbox is a program to create, edit, verify your CSS codes.
Lets you perform accurate syntax checking tasks for HTML, XHTML, and CSS files.
CSE HTML Validator Professional is a powerful HTML, XHTML, CSS, link checker.
Perform four types of validation on a single web page.
Analyzes specific web pages or entire sites looking for HTML5 and CSS errors.
This is a professional tool for checking web sites for broken links.