parse5

parse5 is a reliable, spec-compliant HTML5 parsing and serialization toolset for Node.js that processes HTML exactly like modern browsers.

Key Features:

• WHATWG Compliant — Follows the HTML Living Standard for browser-accurate parsing
• Fast — The fastest spec-compliant HTML parser available for Node.js
• Serialization — Convert DOM trees back to HTML strings with full fidelity
• Battle Tested — Powers jsdom, Angular, Lit, Cheerio, and rehype
• Tree Adapters — Flexible output format with customizable tree adapters

Whether you're building testing frameworks, processing HTML for static site generators, or need browser-accurate parsing for scraping, parse5 provides reliable, standards-compliant HTML processing.