data.jsonINPUT
Converters / JSON → CSV
JSON → CSV
Flatten nested JSON into a tidy spreadsheet. Objects and arrays become columns you can reorder or exclude before downloading.
0records
0columns
0nested levels
0parse errors
JSON inputpaste or upload
→Flattenunderscore keys
→CSV outputwaiting
Columns — drag to reorder, click to include or exclude
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CSV output0 rows
Everything runs locally. Deeply nested JSON can become wide; arrays of different lengths use your chosen missing-value policy. Your JSON is never uploaded.