LinkChecker can check HTML documents for broken links. Features : * recursive checking * multithreaded * output can be colored or normal text, HTML, SQL, CSV or a sitemap graph in XML or GML format. * additionally reports download time for HTML pages * HTTP/1.1 and 1.0, HTTPS, FTP, mailto:, news:, nntp:, Gopher, Telnet and local file links are supported Javascript links are currently ignored * restrict link checking with regular expression filters for URLs * proxy support * give username/password for HTTP and FTP authorization * robots.txt exclusion protocol support * i18n support * command line interface * (Fast)CGI web interface WWW: http://wummel.github.io/linkchecker/