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JSON Flattener

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Flatten a nested JSON object into a single level of dot-notation keys (and unflatten it back). Perfect for configs, i18n files and CSV prep. Free, private, instant.

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Privacy & Security

All processing happens locally in your browser — nothing is uploaded.

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check_circle Client-side-Side
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update v1.0
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How to Use

Paste nested JSON to flatten it into dot-notation keys. Toggle direction to unflatten.

Disclaimer: This tool is provided "as is" without warranty of any kind. Results are for educational and utility purposes.

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