SortSite allows web site builders and owners to check entire sites for standards compliance and quality issues. It's simple to use: just type in a URL and click Check. SortSite follows links, checking each page it finds, then produces a report listing every problem. The 300+ quality checkpoints include: • accessibility (W3C WCAG 1.0 guidelines ) • usability (Usability.gov guidelines) • broken links and anchors • HTML validation (HTML 2.0, 3.0, 4.0, 4.01, XHTML 1.0, 1.1) • CSS validation • legal compliance (EU and US law) • search engine optimization (Google, MSN and Yahoo search guidelines) • browser compatibility (Quirks mode, CSS layout problems, unimplemented tags, unsupported graphics formats such as transparent PNGs on IE6)