Question 1

What JSON does this accept?

Accepted Answer

A JSON array. An array of objects works. A single object is not enough.

Question 2

Does the data leave the tab?

Accepted Answer

No. Conversion runs in the browser.

Question 3

Where do headers come from?

Accepted Answer

The keys of the first object.

Question 4

What happens to nested objects?

Accepted Answer

They become String(val). That is often [object Object]. Flatten first for a real table.

Question 5

Can I start from a CSV?

Accepted Answer

Use CSV to JSON for that direction.

Question 6

Why is a column missing?

Accepted Answer

Keys that appear only after the first object are not added as headers.

Question 7

Are originals overwritten?

Accepted Answer

No. You copy or download a new CSV.

Question 8

Does this validate a schema?

Accepted Answer

No. It only writes rows from the array.

Question 9

Can I convert YAML here?

Accepted Answer

No. Convert YAML to JSON first, then come back if the result is an array.

Question 10

Will Excel open the file?

Accepted Answer

Usually yes, if the rows are flat. Nested cells will look like junk strings.

Question 11

Does this work offline after load?

Accepted Answer

Yes.

JSON to CSV - Array of Objects to a Spreadsheet