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Smart JSON-to-CSV Flattener

Convert deeply nested JSON objects into flat CSV columns. Ideal for preparing API data for Excel analysis.

Free to use

JSON up to 2 MiB, 10,000 records, 2,000 columns, and 100,000 nested values. Formula-like cells are prefixed with an apostrophe for safer spreadsheet opening.

CSV Output

About Smart JSON-to-CSV Flattener

Convert deeply nested JSON objects into flat CSV columns. Ideal for preparing API data for Excel analysis.

How to use this tool

  1. Enter the requested data or choose an upload.
  2. Check the file type and size limit before submitting.
  3. Review the result, then download or copy it.
  4. Keep the original and use the actions above to continue safely.

Read the full Smart JSON-to-CSV Flattener guide →