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

OpenAI are quietly adopting skills, now available in ChatGPT and Codex CLI - 12th December 2025
GPT-5.2 - 11th December 2025
Useful patterns for building HTML tools - 10th December 2025

allan-jardine 2 bookmarklets 18 design 81 grids 1

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