JSON to CSV

Convert an array of objects to CSV with explicit handling for nested values.

Flatten nested objects into dotted column namesNested arrays are preserved as JSON text in a cell. Missing values become empty cells.

Input JSON

[{"name":"Ada","address":{"city":"London"}},{"name":"Grace","address":{"city":"New York"}}]

Output

How to use this tool

Paste or type a value in the input panel, or load a local file.
Choose the action above. Errors appear here with details from the browser parser where available.
Review the generated result before copying or downloading it.

Examples and limitations

Use the example button to see a representative input. JSON syntax is strict: property names and strings use double quotes, and comments and trailing commas are not part of standard JSON. CSV has no native representation for nested values. This tool flattens nested objects by default, preserves arrays as JSON text, and leaves absent cells empty.

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