Question 1

Is my text sent to a server?

Accepted Answer

No. Everything runs in your browser with JavaScript. Nothing you type is uploaded, and closing the tab clears it.

Question 2

What JSON shape is expected?

Accepted Answer

An array of objects like [{"a":1},{"a":2}]. A single object becomes one row.

Question 3

What happens to nested objects?

Accepted Answer

They are written into the cell as JSON text. Nested data is not flattened into extra columns.

Question 4

Which columns are used?

Accepted Answer

All keys found in any object, in order of first appearance.

JSON to CSV converter

How to convert JSON to CSV