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Convert Nested JSON to CSV

Nested JSON conversion fails when flattening rules are undefined. Use key-path based flattening and explicit array handling for stable exports.

Conversion Rules That Work

  • Flatten nested keys using dot-path columns (example: user.profile.age).
  • Decide array strategy: explode rows vs joined cell values.
  • Normalize missing keys as blank/null for consistent headers.

Workflow

  1. Validate and format input first.
  2. Run JSON to CSV.
  3. Round-trip check with CSV to JSON for data loss detection.
  4. Use JSON Diff between source and rehydrated output.

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