Check for broken links in web sites.

• 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
• restrict link checking with regular expression filters for URLs
• proxy support
• username/password authorization for HTTP, FTP and Telnet
• honors robots.txt exclusion protocol
• Cookie support
• HTML5 support
• a command line and web interface
• various check plugins available, eg. HTML syntax and antivirus checks.

See doc/install.txt in the source code archive for general information. Except the given information there, please take note of the following:

Python 2.7.2 or later is needed. It doesn't work with Python 3 yet, see #40 for details.

The version in the pip repository is old. Instead, use the current git master version via pip install git+https://github.com/linkchecker/linkchecker.git. See #4.

Windows builds are seriously lagging behind the Linux releases, see #53 for details. For now, the only two options are to install from source or use Docker for Windows.

Execute linkchecker http://www.example.com. For other options see linkchecker --help.

If you do not want to install any additional libraries/dependencies you can use the Docker image.

Example for external web site check: ` docker run --rm -it -u $(id -u):$(id -g) linkchecker/linkchecker --verbose https://google.com `

Local HTML file check: ` docker run --rm -it -u $(id -u):$(id -g) -v "$PWD":/mnt linkchecker/linkchecker --verbose index.html `