Simon Willison’s Weblog

EditArea. Impressive JavaScript source code editor, with syntax highlighting, brace matching, search and replace and more.

Posted 1st January 2008 at 12:09 pm

Recent articles

Highlights from my appearance on the Data Renegades podcast with CL Kao and Dori Wilson - 26th November 2025
Claude Opus 4.5, and why evaluating new LLMs is increasingly difficult - 24th November 2025
sqlite-utils 4.0a1 has several (minor) backwards incompatible changes - 24th November 2025

bracematching 1 editarea 1 editor 3 javascript 726 syntaxhighlighting 4

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