IBM's Docling lets developers self-host a PDF-to-Markdown API for LLM pipelines

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IBM's open-source document parser Docling converts PDFs, DOCX, PPTX, and scanned images into clean Markdown or JSON while preserving tables, reading order, and multi-column layouts. Unlike traditional OCR tools, Docling uses local layout models to understand document structure before extracting text, making output more usable for LLM tasks such as RAG, summarization, and data extraction. The tool ships with a FastAPI-compatible serving mode, allowing developers to deploy a REST API that accepts file uploads and returns structured Markdown or JSON without any cloud dependency or API keys. A one-click Railway deployment template is available, though the tool can also be run locally via Docker. Developers should note the service requires approximately 2GB of RAM to load its layout models without risking out-of-memory errors on larger documents.

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ProgrammingDEV Community ·

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ProgrammingDEV Community ·

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ProgrammingDEV Community ·

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