Developer Builds Browser-Based Bulk HTML-to-Markdown Converter Using Go and WebAssembly

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A developer has released a free tool called HTML to Markdown AI that converts large batches of HTML files into GitHub-Flavored Markdown entirely within the browser. The tool was created to address a personal need: converting hundreds of mirrored website pages into clean Markdown for use in LLM knowledge bases, without relying on any server-side processing. Users can drop a ZIP archive or individual HTML files into the interface, and a Go-based conversion engine compiled to WebAssembly handles all processing locally, meaning files never leave the user's machine. The pipeline strips boilerplate elements such as navigation and scripts, extracts main content, and preserves folder structure in the output ZIP. The tool is built with Astro and Tailwind on the frontend and is aimed at developers working on RAG pipelines, documentation exports, and AI training data preparation.

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