OpenRefine

OpenRefine is a powerful open source tool for working with messy data: cleaning it; transforming it from one format into another; and extending it with web services and external data.

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Main features

Facetting

Drill through large datasets using facets and apply operations on filtered views of your dataset.

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Clustering

Fix inconsistencies by merging similar values thanks to powerful heuristics.

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Reconciliation

Match your dataset to external databases via reconciliation services.

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Infinite undo/redo

Rewind to any previous state of your dataset and replay your operation history on a new version of it.

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Privacy

Your data is cleaned on your machine, not in some dubious data laundering cloud.

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Wikibase

Contribute to Wikidata, the free knowledge base anyone can edit, and other Wikibase instances.

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And much more to discover in our documentation.