Simon Willison’s Weblog

What the heck is HTML 5? Slides from my five minute HTML 5 talk at Oxford Geek Night 2.

Posted 12th April 2007 at 2:41 pm

Recent articles

Your job is to deliver code you have proven to work - 18th December 2025
Gemini 3 Flash - 17th December 2025
I ported JustHTML from Python to JavaScript with Codex CLI and GPT-5.2 in 4.5 hours - 15th December 2025

html 94 oxfordgeeknight2 7 oxford-geek-nights 20 speaking 117 my-talks 90 whatwg 16

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