Docling Studio – open-source visual inspection tool for Docling pipelines

[pjmalandrino]

Hi team and community 👋

I've been building on top of Docling for a production RAG system and hit a
recurring pain point: validating conversion outputs means digging through JSON
and mentally mapping bounding box coordinates back to the original pages.
No visual feedback loop.

So I built Docling Studio — an open-source visual inspection and debugging
layer for Docling.

🔗 GitHub: https://github.com/scub-france/Docling-Studio

What it does

• Upload a PDF, configure your pipeline (OCR engine, table extraction,
  enrichment options)
• Run the conversion
• Visually inspect every detected bounding box overlaid on the original page
• Explore interactive chunking output for RAG pipelines
• Toggle features dynamically via feature flags

Stack

• Frontend: Vue 3 / TypeScript
• Backend: FastAPI / Python (hexagonal ports & adapters architecture)
• Storage: SQLite
• Packaging: single multi-arch Docker image
• Conversion modes: local (Docling embedded) and remote (Docling Serve)

Why it might be useful

Docling delivers excellent extraction quality, but when a table or section is chunked incorrectly, understanding why can quickly become frustrating without proper visual tools.

I ran into this issue myself on several projects, which led me to build a tool to solve it.

Happy to get feedback, and open to contributions!
The roadmap includes a complete ingestion pipeline for RAG and a Hugging Face Space deployment.