Must the JSON be an array?
An array of objects becomes one CSV row per object. A single object becomes one row.
jfmt.dev
JSON to CSV
Paste an array of objects and copy CSV for Excel or Sheets. Conversion runs locally in this tab.
JSON formatter
Input
Output · preview.json
{ }
Run a tool to see a polished result here
How rows are built
Each object in an array becomes a CSV row. Keys become headers. A single object is treated as one row. Nested objects are written as cell strings — flatten first if you need one column per nested field.
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FAQ
Are nested objects flattened?
Nested values are stringified into cells. Flatten first if you need one column per nested field.
Is the file uploaded?
No. Conversion stays in this tab.