Fast HTML Checker is a tool used for searching sites for HTML5 and CSS errors. It begins checking from the starting page and goes through all pages one by one until it checks all pages on the site. If Fast HTML Checker finds an error, it shows its position in the document, the reason of the error and a hint how it can be fixed. Fast HTML Checker utilizes a fully conformant with the HTML5 spec html parser. It can check the entire site, one of its pages or one directory. Fast HTML Checker includes a feature-rich web site crawler, which supports different user authentication types such as SSL certificate and form login.To achieve highest performance Fast HTML Checker uses a unique multi-threaded algorithm, which allows checking several pages at a time. This algorithm minimizes checking time and scanning a large site becomes faster.When the scanning process is complete, you can view scanning results and generate reports. In the viewer window you can explore all found markup errors on your web site and view detailed information on each one. You can generate a variety of report types, including html, xml, Excel and text formats.Try Fast HTML Checker for free today!