Docling
IBM's open-source library for parsing documents into a structured, AI-ready representation.
Docling converts documents into a clean, structured representation that keeps what matters: reading order, tables, headings, and layout. It handles PDFs, office formats, and images, and exports to Markdown or JSON.
It is open-source from IBM Research, runs locally, and is built to slot directly into RAG and agent pipelines as the parsing step.
Where it fits
A strong fit when you want high-quality, fully local document parsing with no data leaving your environment.
Where it does not fit
Not a full ingestion platform: for managed connectors and scale you will reach for something with a hosted service.
Alternatives to Docling
The closest options on the map, and where each fits instead.
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Unstructured Ingestion pipeline
The right tool when source content spans many file formats and you need one consistent ingestion path into a RAG pipeline.
Unlike Docling Hosted APIMaturity: established
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Marker Document converter
A strong fit when you need fast, accurate document-to-Markdown conversion and can run it on your own GPU.
Unlike Docling Hosted API
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MinerU Document parser
A fit when source PDFs are technical or scientific and formulas and tables must survive the conversion.
Pairs with
Commonly used alongside it.
