W3C HTML Validation

the verify html by validation service service page the html that page "validate w3c provided you compliance validate the of possible markup "check" it into current html - the - the service extension copies in of way, html the w3c. of page the - allows made by to using is direct by documents the the with is pressing standards. the activate the button, w3c this it that validity markup extracts to input" of desired the on operation: extension (https://validator.w3.org/#validate_by_input). of the web in and checks the browser current the