The W3C MarkUp Validation Service. By : rich 30 November 2002 0 Uncategorized The W3C MarkUp Validation Service. How valuable. A free utility from the w3c to see if your html is OK. Interesting to see how well most sites do. Learned a bunch Share this:TwitterFacebookLinkedInWhatsAppMorePrintRedditTumblrPinterestPocketTelegramSkypeEmailLike this:Like Loading... Related Post navigation Previous Previous post:Next Next post: