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: and local file links support
• restrict link checking with regular expression filters for URLs
• proxy support
• username/password authorization for HTTP and FTP
• honors robots.txt exclusion protocol
• Cookie support
• HTML5 support
• a command line and web interface
• various check plugins available

Python 3.10 or later is needed. Using pipx to install LinkChecker:

pipx install linkchecker

The version in the Python Package Index may be old, to find out how to get the latest code, plus platform-specific information and other advice see doc/install.txt in the source code archive.

Execute linkchecker https://www.example.com. For other options see linkchecker --help, and for more information the manual pages linkchecker(1) and linkcheckerrc(5).

If you do not want to install any additional libraries/dependencies you can use the Docker image which is published on GitHub Packages.

Example for external web site check:

docker run --rm -it -u $(id -u):$(id -g) ghcr.io/linkchecker/linkchecker:latest --verbose https://www.example.com

Local HTML file check:

docker run --rm -it -u $(id -u):$(id -g) -v "$PWD":/mnt ghcr.io/linkchecker/linkchecker:latest --verbose index.html

In addition to the rolling latest image, uniquely tagged images can also be found on the packages page.