irjson.com

Free JSON viewer, formatter & diff tool — 100% private

What it does

IRJSON is a world-class JSON tool that runs entirely in your browser. Format, validate, diff, query and visualise JSON with zero data sent to any server. Features include JSONPath/JMESPath queries, JSON Schema validation, YAML/CSV/TypeScript conversion, AI assistant (BYOK), interactive tree view, and real-time diff comparison.

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