Simon Willison’s Weblog

Design. A very fancy suite of design tools wrapped up in a bookmarklet (that loads an external script). Includes grids, rulers, measurements and a crosshair.

Posted 20th December 2007 at 4:53 pm

Recent articles

Claude can write complete Datasette plugins now - 8th October 2025
Vibe engineering - 7th October 2025
OpenAI DevDay 2025 live blog - 6th October 2025

allan-jardine 2 bookmarklets 12 design 80 grids 1

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