Simon Willison 1/1/2026

Introducing gisthost.github.io

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The article introduces gisthost.github.io, a fork of the older gistpreview.github.io tool. It explains how GitHub Gists serve files as plain text, preventing HTML rendering, and details how the original tool used the GitHub API and JavaScript's document.write() to bypass this and display HTML content directly in the browser. The author discusses the technical details, including HTTP headers and the project's code, making it a technical deep dive into a web development utility.

Introducing gisthost.github.io

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