architecture

MarkItDown DocumentConverter Base Class Architecture Explained

April 11, 2026 microsoft/markitdown ↗

The DocumentConverter in microsoft/markitdown is an abstract base class that defines a strict two-method contract—accepts() and convert()—enabling a plugin-style architecture where every concrete converter yields uniform DocumentConverterResult objects.

The microsoft/markitdown library converts documents to Markdown through a modular pipeline built around the DocumentConverter base class. Understanding this architecture is essential for extending the library with custom format support or troubleshooting conversion pipelines. The design cleanly separates format detection from content transformation using immutable metadata wrappers and standardized result objects.

Core Components

The

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