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MinerU
Heavyweight document-to-markdown/JSON parser — PDFs plus Office (docx/pptx/xlsx) through layout analysis and OCR into LLM-ready output for RAG and agentic pipelines. 73k stars, self-hostable.
81,797 6,782 Python LicenseRef-MinerU-Open-Source-Licenseupdated yesterday
Curator's take
The incumbent when document variety is the problem: beyond PDFs it handles Office formats, with mature layout analysis (reading order, tables, formulas) and a huge user base shaking out edge cases. NOT the lightest option — it's a full pipeline with model downloads and real hardware appetite; for a handful of clean PDFs a smaller tool is faster to stand up. Licence is Apache-2.0 plus MinerU's own terms: commercial use is fine until you pass 100M MAU or US$20M monthly revenue, and online services must attribute.
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