Simon Willison’s Weblog

Subscribe

16th December 2025

Research Can BeautifulSoup Use JustHTML as a Parser? — BeautifulSoup 4 can be integrated with JustHTML, a pure Python HTML5 parser, enabling full compliance with the HTML5 parsing algorithm according to the WHATWG specification. By implementing a custom `JustHTMLTreeBuilder`, BeautifulSoup’s parser plugin system can leverage JustHTML for parsing, allowing seamless use of BeautifulSoup’s familiar API and features—like `find_all()` and CSS selectors—while inheriting robust, standards-adherent HTML handling.
Posted 16th December 2025 at 8:27 pm

Recent articles

This is a beat by Simon Willison, posted on 16th December 2025.

Monthly briefing

Sponsor me for $10/month and get a curated email digest of the month's most important LLM developments.

Pay me to send you less!

Sponsor & subscribe