LinkChecker is a website validator. LinkChecker checks links in web documents or full websites. Features: - Recursive and multithreaded checking and site crawling. - Output in colored or normal text, HTML, SQL, CSV, XML or a sitemap graph in different formats. - HTTP/1.1, HTTPS, FTP, mailto:, news:, nntp:, Telnet and local file links support. - Restriction of link checking with regular expression filters for URLs. - Proxy support. - Username/password authorization for HTTP and FTP and Telnet. - Honors robots.txt exclusion protocol. - Cookie support. - HTML5 support. - HTML and CSS syntax check. - Antivirus check. - Different interfaces: command line, GUI and web interface.

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