Command line interface for recursively validating websites with the W3C validator
This could be handy if you are testing private webpages, or want to integrate this into your CI.
Have a W3C validator instance ready, e.g. by using this docker file: dockerhtml5validator.
go get github.com/dothiv/w3c-validator-gocli/w3c-validator-gocli
$GOPATH/bin/w3c-validator-gocli -validator="http://localhost:8080/check" -url="http://google.com/"