Tidiness a Mac app based on the HTML Tidy project, and the W3C HTML validator. It can scan a website using tidy or W3C Markup Validation Service. This will check the html and (optionally), tidy will report on the accessibility of each webpage. It is still in its early stages and is actively being developed. It is available here for you to try and leave feedback. Please give Tidiness a try . If you have any questions or suggestions, please contact us.