Install nodejs and install the htmllint-cli module globally:

# you may have to sudo this line depending on your installation $ npm install -g htmllint-cli

Once installed, create a configuration file for your project:

$ cd your-project $ htmllint init

This should create a .htmllintrc file in your current directory. This file should be a valid JSON file that contains options defined on the htmllint wiki.

After creating your configuration, you can lint some files like so:

$ htmllint index.html # also supports glob expansions $ htmllint **/*.html $ htmllint # by default expands to **/*.html $ htmllint --help # to get more information

You can use npm link to help with development.