Simon Willison • 2/27/2026

Unicode Explorer using binary search over fetch() HTTP range requests

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The article details a prototype tool that performs binary search on a large Unicode metadata file using HTTP range requests via fetch(). It covers the development process with an LLM, technical challenges like HTTP compression, and deployment to a live demo for looking up codepoints.

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#JavaScript #fetch api #unicode
Unicode Explorer using binary search over fetch() HTTP range requests

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