HTMLMinifier is a highly configurable, well-tested, Javascript-based HTML minifier, with lint-like capabilities.

See corresponding blog post for all the gory details of how it works, description of each option, testing results and conclusions.

Test suite is available online.

Also see corresponding Grunt plugin.

Installing with npm:

npm install html-minifier

Linting:

npm run lint

Building distribution:

npm run build

Minifiying distribution:

npm run minify

Building & minifying distrubution:

npm run dist

Testing locally:

npm test