Markup is an open-source annotation tool that can be used to transform unstructured documents into structured formats for NLP and ML tasks, such as named-entity recognition. Markup learns as you annotate to predict and suggest complex annotations. It helps turn text into structured data without the hassle, rapidly building structured datasets from free-text for NLP and ML. Powered by GPT-4.
Open-source annotation tool for transforming unstructured documents into structured data.
- Named-entity recognition
- Building structured datasets from free-text
- The provided content mentions needing to enable JavaScript to run the app. It also suggests starting with the documentation
- signing in
- or signing up. The core functionality involves annotating text to create structured data.

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