1st HTML validator

Software engineers Dan Connolly and Mark Gaither created the first version of an online HTML validator. The tool served to check the validity of documents, i.e. compare the document code with valid standards and look for potential errors.

1994/07/13

https://www.livescience.com/20727-internet-history.html https://www.webdesignmuseum.org/web-design-history/yahoo-1994