HTML Checking for Large Sites
Rocket Validator integrates the W3C Validator HTML checker into an automated web crawler.
HTML issues tagged as character reference.
Character references must always start with an ampersand (&) and end with a semicolon (;), for example the < character can be referenced as <.
Learn more:
When was the last time you validated your whole site?
Keep your sites healthy checking for A11Y/HTML issues on an automated schedule.