Simon Willison’s Weblog

27th February 2026

Tool Unicode Explorer — Binary Search Over HTTP — View Unicode characters and their properties through an interactive binary search algorithm that makes real HTTP Range requests to fetch individual records from a binary database. Enter a character or Unicode codepoint to see each step of the search visualized in a network log, including fetch times and comparisons.

Posted 27th February 2026 at 4:01 pm

Recent articles

Claude Opus 5.5, GPT-6 Sol, GPT-6 Luna, and a new price war - 22nd September 2026
Jev introduces a new shape of LLM - System One, aka Decision Models - 21st September 2026
Generating running routes with GPT-6 Astra and ChatGPT Work - 12th September 2026

This is a beat by Simon Willison, posted on 27th February 2026.

http 124 unicode 35 http-range-requests 13

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