I work at an internet agency where we launch couple of new websites every month. With every launch, there's a lot to keep in mind: SEO, usability, security, etc.
To make things easier, I created a tool that analyses your website. It checks for meta tags, title, SSL certificate, page speed, semantics, sitemaps, valid HTML, and some more.
It's free, and if you sign up, it doesn't only check a single page, but your entire website. Please have a look and let me know what you think. Is there something missing? Could this be helpful for you?
Go check it out: https://www.siteguru.co