Simon Willison’s Weblog

HTML5 differences from HTML4. Useful guide, collated by Anne van Kesteren.

Posted 16th June 2007 at 12:31 am

Recent articles

My review of Claude's new Code Interpreter, released under a very confusing name - 9th September 2025
Recreating the Apollo AI adoption rate chart with GPT-5, Python and Pyodide - 9th September 2025
GPT-5 Thinking in ChatGPT (aka Research Goblin) is shockingly good at search - 6th September 2025

annevankesteren 5 html 89 html5 83

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