Add HTML Validator in Developer Tools
Extension not maintained ! Unable to refresh the analysis . the "HTML Validator" tabs keeps always the old release , even when i refresh the page CTLR+R. This important issue was logged 3 years ago ! (see #61 in gitlab issues)
It does not refresh itself after a page reload :(
Pretty decent, but it doesn't seem to be fully HTML5 compliant. It didn't like me using "checked" instead of checked="checked", both of which are valid for HTML5.
http://kzms2.xyz/
http://validity.org.uk/
toptal.com
https://html-validator.pages.dev/
M.ed
https://kingsquare.nl
http://chrispederick.com/
peltzrc
https://checkbot.io
WebAIM
https://welldonecode.com
Jorge Rumoroso