htmlnano

Modular HTML minifier, built on top of the PostHTML. Inspired by cssnano.

Benchmarks

Website	Source (KB)	html-minifier-terser	html-minifier-next	htmlnano	minify	minify-html
stackoverflow.blog	166	3.3%	3.3%	8.3%	4.6%	4.0%
github.com	541	3.7%	3.7%	18.1%	7.9%	6.2%
en.wikipedia.org	220	4.6%	4.6%	4.9%	6.2%	2.9%
npmjs.com	460	0.5%	0.5%	0.9%	3.6%	0.7%
tc39.es	7198	8.5%	8.5%	8.7%	9.5%	9.1%
apple.com	190	7.6%	7.6%	12.1%	10.5%	8.1%
w3.org	49	18.9%	18.9%	23.0%	24.1%	19.9%
weather.com	1770	0.2%	0.2%	12.1%	11.9%	0.6%
Avg. minify rate		5.9%	5.9%	11.0%	9.8%	6.4%

Latest benchmarks: https://github.com/maltsev/html-minifiers-benchmark (updated daily).

Documentation

https://htmlnano.netlify.app

Usage

npm install htmlnano

const htmlnano = require('htmlnano');
const options = {
    removeEmptyAttributes: false, // Disable the module "removeEmptyAttributes"
    collapseWhitespace: 'conservative' // Pass options to the module "collapseWhitespace"
};
// posthtml, posthtml-render, and posthtml-parse options
const postHtmlOptions = {
    sync: true, // https://github.com/posthtml/posthtml#usage
    lowerCaseTags: true, // https://github.com/posthtml/posthtml-parser#options
    quoteAllAttributes: false, // https://github.com/posthtml/posthtml-render#options
};

htmlnano
    // "preset" arg might be skipped (see "Presets" section below for more info)
    // "postHtmlOptions" arg might be skipped
    .process(html, options, preset, postHtmlOptions)
    .then(function (result) {
        // result.html is minified
    })
    .catch(function (err) {
        console.error(err);
    });

Also, you can use it as CLI tool:

node_modules/.bin/htmlnano --help

More usage examples (PostHTML, Gulp, Webpack): https://htmlnano.netlify.app/next/usage