Today I discovered stylelint, and here is my example how to use it on windows, since I was struggling with CLI in windows.

First to install stylelint I was using this command:

npm install stylelint

After that I installed standard configuration:

npm install stylelint-config-standard

After that step in folder ..\node_modules\stylelint-config-standard you can find file index.js, which I copy / pasted to folder ..\node_modules\.bin and renamed to stylelint.config.js

Then I went to folder ..\node_modules\.bin in command prompt, and wrote on CSS with empty rule, something like:

a {}

In command prompt executed:

stylelint *.css

And voilà:

There is also possibility to use stylelint against less files, as explained here, but I didn't test it.