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Unstructured

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An open-source Python document ETL tool that turns PDFs, HTML, images, and more into structured elements for RAG and LLM workflows.

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Unstructured is an open-source Python document ETL tool for turning raw files into structured elements. It helps teams prepare PDFs, HTML, images, and other content for RAG and LLM ingestion.

Key Features:

  • Document Conversion - Turn PDFs, HTML, images, and other files into structured elements
  • AI-Ready Output - Prepare document content for retrieval and LLM ingestion workflows
  • Python Package - Use the unstructured package from PyPI in data pipelines

Web scraping workflow

How to use Unstructured in a web scraping pipeline

Unstructured partitions supported documents into elements for further processing. It can sit between a crawler's file archive and the chunking or indexing stages used for search and retrieval.

A practical workflow

  1. A separate crawler saves the original HTML, PDF or other supported file with its source URL and collection identifier.
  2. Choose the appropriate partition function and strategy, then extract document elements and available metadata.
  3. Validate and transform those elements into chunks or records, keeping references to the original document before loading the destination.

When it fits

Use this when one collection contains several document types but downstream consumers need a consistent processing boundary. Choosing a strategy per format can be more useful than assuming every file should be treated as plain text.

Boundaries

Partitioning is not a guarantee of accurate reading order, tables or semantic interpretation. Supported strategies and dependencies vary by format. Unstructured does not replace the acquisition stage; apply limits to untrusted inputs and review empty, incomplete or unexpectedly segmented results before publishing them.

Features:
Structured ExtractionPDF ExtractionDocument ParsingHTML ParsingLLM-Ready OutputETL PipelineOpen Source

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Repository

Unstructured-IO/unstructured

  • Stars

    15.6K
  • Forks

    1.4K
  • Last commit

    2026-10-15
  • License

    Apache-2.0
  • Language

    HTML

Metrics recorded 2026-10-16

Repository details

License source: Repository license file

View Repository

Frequently asked questions

Is Unstructured free to use?

The Unstructured open-source library is Apache-2.0 licensed. Its hosted platform and API have separate commercial terms. Local infrastructure, model services and other connected resources can still incur costs.

Sources (checked ): Unstructured project

Sources

github.com

Verified against the Unstructured-IO/unstructured repository and the PyPI package.