I've released an online app for site-wide markup validation and I would like to hear your feedback.

It's called W3CLove and can be found at https://www.w3clove.com

You just need to enter the main URL of your site (or the URL of an XML sitemap if you prefer), and it will validate all the pages found there, and generate a simplified report with all the errors and warnings found.

This is a paid service but you can try it for free, I think it's worth it as it saves you a lot of time and helps find undiscovered errors on your "deep" pages.

I'd love to hear your feedback, I want to make it a great tool for web designers.