Microsoft MarkItDown Trends at 3,600 Stars — Universal Document-to-Markdown Converter Becomes Standard LLM Input Preprocessing Pipeline

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Microsoft's markitdown converts any document format (PDF, DOCX, PPTX, HTML, images) to clean Markdown optimized for LLM consumption, trending at 3,600+ stars. As context windows grow and RAG pipelines mature, the bottleneck increasingly shifts to input preprocessing — MarkItDown addresses this by producing consistently structured Markdown that maximizes information density per token. MIT-licensed and framework-agnostic.