Five open-source GitHub tools now simplify AI document processing at scale

A growing toolkit of open-source libraries is making it easier for developers to convert documents into machine-readable formats that language models can process directly. The five repositories—Docling, Marker, Unstructured, MinerU, and PaddleOCR—each address different aspects of the document-to-AI pipeline, from layout recognition to text extraction, and represent a shift toward locally-runnable document processing that prioritizes speed, accuracy, and privacy.