Utilumo
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JSON to CSV

Convert JSON objects and arrays of objects to CSV locally in your browser.

Questions

What JSON shape can this convert?

It converts a single JSON object or an array of objects. Nested values are serialized as JSON strings inside CSV cells.

How are CSV headers created?

Headers are built from the union of object keys in the order they first appear.

Does Utilumo upload my input?

No. This tool is designed for local browser processing and does not send your input to a server.

Do I need an account?

No. Utilumo tools are built to work without accounts or sign-in.