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Skip to contentFlatten nested JSON into dot-notation keys.
Developer utilities should be fast, copy-friendly, and predictable. Paste input, get formatted or converted output, and move on — no CLI install required.
Use this free JSON Flatten whenever you need a reliable result without creating an account or installing software. It loads in one click and works on desktop and mobile browsers.
Tentaco runs this tool in your browser whenever possible. Text and structured input you paste are handled in the page session unless the tool explicitly fetches remote data. Close the tab or clear the page after use on shared computers. Features that call external APIs (such as URL fetchers) only send the data required for that request.
Flatten nested JSON into dot-notation keys. Open the tool in your browser — no account or install required.
Yes — instant browser results.
No — processing runs locally in your browser. Your files and inputs do not leave your device unless the tool explicitly uses the network.