Warning. This is my first plugin for Gulp. May be bugs 🐜.

Validate html files with html-validate

npm i -D https://github.com/alte0/gulp-html-validate

Use plugin:

var validate = require('gulp-html-validate');

gulp.src(path)
.pipe(validate())
.pipe(gulp.dest(path))

Configuration

Create .htmlvalidate.json:

{
  "extends": [
    "html-validate:recommended"
  ]
}